diff --git a/Project.toml b/Project.toml
index 42b07660a9..e4d162965f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,6 +10,7 @@ ClimaComms = "3a4d1b5c-c61d-41fd-a00a-5873ba7a1b0d"
 ClimaCore = "d414da3d-4745-48bb-8d80-42e94e092884"
 ClimaCoreTempestRemap = "d934ef94-cdd4-4710-83d6-720549644b70"
 ClimaLSM = "7884a58f-fab6-4fd0-82bb-ecfedb2d8430"
+ClimaUtilities = "b3f4f4ca-9299-4f7f-bd9b-81e1242a7513"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 DocStringExtensions = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 Insolation = "e98cc03f-d57e-4e3c-b70c-8d51efe9e0d8"
@@ -34,6 +35,7 @@ ClimaComms = "0.5"
 ClimaCore = "0.10"
 ClimaCoreTempestRemap = "0.3"
 ClimaLSM = "0.3.2"
+ClimaUtilities = "0.1.1"
 DocStringExtensions = "0.8, 0.9"
 Insolation = "0.6"
 JLD2 = "0.4"
diff --git a/docs/Project.toml b/docs/Project.toml
index 66005a86ff..757d5c53ae 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -1,5 +1,6 @@
 [deps]
 ClimaCoupler = "4ade58fe-a8da-486c-bd89-46df092ec0c7"
+ClimaUtilities = "b3f4f4ca-9299-4f7f-bd9b-81e1242a7513"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 Literate = "98b081ad-f1c9-55d3-8b20-4c87d4299306"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
diff --git a/docs/make.jl b/docs/make.jl
index d6de55f844..443f171057 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -64,7 +64,6 @@ interface_pages = [
     "utilities.md",
     "bcreader.md",
     "testhelper.md",
-    "timemanager.md",
 ]
 performance_pages = ["performance.md"]
 
diff --git a/docs/src/timemanager.md b/docs/src/timemanager.md
deleted file mode 100644
index 9fd9c162a7..0000000000
--- a/docs/src/timemanager.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# TimeManager
-
-This module contains functions that handle dates and times
-in simulations. The functions in this module often call
-functions from Julia's [Dates](https://docs.julialang.org/en/v1/stdlib/Dates/) module.
-
-## TimeManager API
-
-```@docs
-ClimaCoupler.TimeManager.current_date
-ClimaCoupler.TimeManager.strdate_to_datetime
-ClimaCoupler.TimeManager.datetime_to_strdate
-ClimaCoupler.TimeManager.trigger_callback
-ClimaCoupler.TimeManager.Monthly
-ClimaCoupler.TimeManager.EveryTimestep
-```
diff --git a/experiments/AMIP/modular/Manifest.toml b/experiments/AMIP/modular/Manifest.toml
index 0970cc4942..984851fbed 100644
--- a/experiments/AMIP/modular/Manifest.toml
+++ b/experiments/AMIP/modular/Manifest.toml
@@ -2,7 +2,7 @@
 
 julia_version = "1.8.5"
 manifest_format = "2.0"
-project_hash = "43b11af04e9e53b2a11737cbd1cdc443f9bb9f21"
+project_hash = "62d8abc16253da5976b5e35ddf6ad7883a59e86e"
 
 [[deps.ADTypes]]
 git-tree-sha1 = "5d2e21d7b0d8c22f67483ef95ebdc39c0e6b6003"
@@ -144,9 +144,9 @@ version = "0.1.2"
 
 [[deps.CLIMAParameters]]
 deps = ["DocStringExtensions", "TOML", "Test"]
-git-tree-sha1 = "d35d039179f27abc063f7ae5c564573fe5316bb2"
+git-tree-sha1 = "9872c4383d3c212096b2750bf1c2237a4670a3af"
 uuid = "6eacf6c3-8458-43b9-ae03-caf5306d3d53"
-version = "0.7.19"
+version = "0.7.20"
 
 [[deps.CPUSummary]]
 deps = ["CpuId", "IfElse", "PrecompileTools", "Static"]
@@ -239,7 +239,7 @@ uuid = "d934ef94-cdd4-4710-83d6-720549644b70"
 version = "0.3.5"
 
 [[deps.ClimaCoupler]]
-deps = ["CLIMAParameters", "ClimaAtmos", "ClimaComms", "ClimaCore", "ClimaCoreTempestRemap", "ClimaLSM", "Dates", "DocStringExtensions", "HDF5", "Insolation", "JLD2", "NCDatasets", "OrdinaryDiffEq", "Plots", "PrettyTables", "SciMLBase", "StaticArrays", "Statistics", "SurfaceFluxes", "TempestRemap_jll", "TerminalLoggers", "Thermodynamics", "UnPack"]
+deps = ["CLIMAParameters", "ClimaAtmos", "ClimaComms", "ClimaCore", "ClimaCoreTempestRemap", "ClimaLSM", "ClimaUtilities", "Dates", "DocStringExtensions", "Insolation", "JLD2", "NCDatasets", "OrdinaryDiffEq", "Plots", "PrettyTables", "SciMLBase", "StaticArrays", "Statistics", "SurfaceFluxes", "TempestRemap_jll", "TerminalLoggers", "Thermodynamics", "UnPack"]
 path = "../../.."
 uuid = "4ade58fe-a8da-486c-bd89-46df092ec0c7"
 version = "0.1.0"
@@ -256,6 +256,14 @@ git-tree-sha1 = "54b602435b0107b6c2dfe7664e0f7ff5fc78fb91"
 uuid = "595c0a79-7f3d-439a-bc5a-b232dc3bde79"
 version = "0.7.7"
 
+[[deps.ClimaUtilities]]
+deps = ["CFTime", "Dates"]
+git-tree-sha1 = "8108441c603a0921e81d5aa5ff07655a7c44c0a1"
+repo-rev = "js/timemanager"
+repo-url = "https://github.com/CliMA/ClimaUtilities.jl.git"
+uuid = "b3f4f4ca-9299-4f7f-bd9b-81e1242a7513"
+version = "0.1.1"
+
 [[deps.CloseOpenIntervals]]
 deps = ["Static", "StaticArrayInterface"]
 git-tree-sha1 = "70232f82ffaab9dc52585e0dd043b5e0c6b714f1"
@@ -276,9 +284,9 @@ version = "0.7.2"
 
 [[deps.ColorSchemes]]
 deps = ["ColorTypes", "ColorVectorSpace", "Colors", "FixedPointNumbers", "PrecompileTools", "Random"]
-git-tree-sha1 = "d9a8f86737b665e15a9641ecbac64deef9ce6724"
+git-tree-sha1 = "67c1f244b991cad9b0aa4b7540fb758c2488b129"
 uuid = "35d6a980-a343-548e-a6ea-1d62b119f2f4"
-version = "3.23.0"
+version = "3.24.0"
 
 [[deps.ColorTypes]]
 deps = ["FixedPointNumbers", "Random"]
@@ -408,9 +416,9 @@ version = "0.1.0+0"
 
 [[deps.DiffEqBase]]
 deps = ["ArrayInterface", "ChainRulesCore", "DataStructures", "Distributions", "DocStringExtensions", "EnumX", "FastBroadcast", "ForwardDiff", "FunctionWrappers", "FunctionWrappersWrappers", "LinearAlgebra", "Logging", "Markdown", "MuladdMacro", "Parameters", "PreallocationTools", "PrecompileTools", "Printf", "RecursiveArrayTools", "Reexport", "Requires", "SciMLBase", "SciMLOperators", "Setfield", "SparseArrays", "Static", "StaticArraysCore", "Statistics", "Tricks", "TruncatedStacktraces", "ZygoteRules"]
-git-tree-sha1 = "6ece6f2956dea6380d8e5e6eadaab1bb9af20cce"
+git-tree-sha1 = "0d9982e8dee851d519145857e79a17ee33ede154"
 uuid = "2b5f629d-d688-5b77-993f-72d75c75574e"
-version = "6.129.0"
+version = "6.130.0"
 
 [[deps.DiffEqCallbacks]]
 deps = ["DataStructures", "DiffEqBase", "ForwardDiff", "Functors", "LinearAlgebra", "Markdown", "NLsolve", "Parameters", "RecipesBase", "RecursiveArrayTools", "SciMLBase", "StaticArraysCore"]
@@ -473,6 +481,12 @@ git-tree-sha1 = "bdb1942cd4c45e3c678fd11569d5cccd80976237"
 uuid = "4e289a0a-7415-4d19-859d-a7e5c4648b56"
 version = "1.0.4"
 
+[[deps.EpollShim_jll]]
+deps = ["Artifacts", "JLLWrappers", "Libdl"]
+git-tree-sha1 = "8e9441ee83492030ace98f9789a654a6d0b1f643"
+uuid = "2702e6a9-849d-5ed8-8c21-79e8b8f9ee43"
+version = "0.0.20230411+0"
+
 [[deps.ExceptionUnwrapping]]
 deps = ["Test"]
 git-tree-sha1 = "e90caa41f5a86296e014e148ee061bd6c3edec96"
@@ -824,9 +838,9 @@ version = "1.0.0"
 
 [[deps.JLD2]]
 deps = ["FileIO", "MacroTools", "Mmap", "OrderedCollections", "Pkg", "Printf", "Reexport", "Requires", "TranscodingStreams", "UUIDs"]
-git-tree-sha1 = "aa6ffef1fd85657f4999030c52eaeec22a279738"
+git-tree-sha1 = "773125c999b4ebfe31e679593c8af7f43f401f1c"
 uuid = "033835bb-8acc-5ee8-8aae-3f567f8a3819"
-version = "0.4.33"
+version = "0.4.34"
 
 [[deps.JLFzf]]
 deps = ["Pipe", "REPL", "Random", "fzf_jll"]
@@ -1387,9 +1401,9 @@ version = "1.2.0"
 
 [[deps.Preferences]]
 deps = ["TOML"]
-git-tree-sha1 = "7eb1686b4f04b82f96ed7a4ea5890a4f0c7a09f1"
+git-tree-sha1 = "00805cd429dcb4870060ff49ef443486c262e38e"
 uuid = "21216c6a-2e73-6563-6e65-726566657250"
-version = "1.4.0"
+version = "1.4.1"
 
 [[deps.PrettyTables]]
 deps = ["Crayons", "LaTeXStrings", "Markdown", "Printf", "Reexport", "StringManipulation", "Tables"]
@@ -1421,9 +1435,9 @@ version = "5.15.3+2"
 
 [[deps.QuadGK]]
 deps = ["DataStructures", "LinearAlgebra"]
-git-tree-sha1 = "6ec7ac8412e83d57e313393220879ede1740f9ee"
+git-tree-sha1 = "eeab25344bf9901146c0200a7ca64ea479f8bf5c"
 uuid = "1fd47b50-473d-5c70-9696-f719f8f3bcdc"
-version = "2.8.2"
+version = "2.9.0"
 
 [[deps.REPL]]
 deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
@@ -1539,9 +1553,9 @@ version = "0.6.39"
 
 [[deps.SciMLBase]]
 deps = ["ADTypes", "ArrayInterface", "ChainRulesCore", "CommonSolve", "ConstructionBase", "Distributed", "DocStringExtensions", "EnumX", "FillArrays", "FunctionWrappersWrappers", "IteratorInterfaceExtensions", "LinearAlgebra", "Logging", "Markdown", "PrecompileTools", "Preferences", "RecipesBase", "RecursiveArrayTools", "Reexport", "RuntimeGeneratedFunctions", "SciMLOperators", "StaticArraysCore", "Statistics", "SymbolicIndexingInterface", "Tables", "TruncatedStacktraces", "ZygoteRules"]
-git-tree-sha1 = "6de099dba3c80e23bde1d19011161ea91a23ed6b"
+git-tree-sha1 = "916b8a94c0d61fa5f7c5295649d3746afb866aff"
 uuid = "0bca4576-84f4-4d90-8ffe-ffa030f20462"
-version = "1.98.0"
+version = "1.98.1"
 
 [[deps.SciMLNLSolve]]
 deps = ["DiffEqBase", "LineSearches", "NLsolve", "Reexport", "SciMLBase"]
@@ -1741,10 +1755,10 @@ uuid = "3783bdb8-4a98-5b6b-af9a-565f29a5fe9c"
 version = "1.0.1"
 
 [[deps.Tables]]
-deps = ["DataAPI", "DataValueInterfaces", "IteratorInterfaceExtensions", "LinearAlgebra", "OrderedCollections", "TableTraits", "Test"]
-git-tree-sha1 = "1544b926975372da01227b382066ab70e574a3ec"
+deps = ["DataAPI", "DataValueInterfaces", "IteratorInterfaceExtensions", "LinearAlgebra", "OrderedCollections", "TableTraits"]
+git-tree-sha1 = "a1f34829d5ac0ef499f6d84428bd6b4c71f02ead"
 uuid = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
-version = "1.10.1"
+version = "1.11.0"
 
 [[deps.Tar]]
 deps = ["ArgTools", "SHA"]
@@ -1900,10 +1914,10 @@ uuid = "19fa3120-7c27-5ec5-8db8-b0b0aa330d6f"
 version = "0.2.0"
 
 [[deps.Wayland_jll]]
-deps = ["Artifacts", "Expat_jll", "JLLWrappers", "Libdl", "Libffi_jll", "Pkg", "XML2_jll"]
-git-tree-sha1 = "ed8d92d9774b077c53e1da50fd81a36af3744c1c"
+deps = ["Artifacts", "EpollShim_jll", "Expat_jll", "JLLWrappers", "Libdl", "Libffi_jll", "Pkg", "XML2_jll"]
+git-tree-sha1 = "7558e29847e99bc3f04d6569e82d0f5c54460703"
 uuid = "a2964d1f-97da-50d4-b82a-358c7fce9d89"
-version = "1.21.0+0"
+version = "1.21.0+1"
 
 [[deps.Wayland_protocols_jll]]
 deps = ["Artifacts", "JLLWrappers", "Libdl", "Pkg"]
@@ -2143,6 +2157,6 @@ version = "3.5.0+0"
 
 [[deps.xkbcommon_jll]]
 deps = ["Artifacts", "JLLWrappers", "Libdl", "Pkg", "Wayland_jll", "Wayland_protocols_jll", "Xorg_libxcb_jll", "Xorg_xkeyboard_config_jll"]
-git-tree-sha1 = "9ebfc140cc56e8c2156a15ceac2f0302e327ac0a"
+git-tree-sha1 = "9c304562909ab2bab0262639bd4f444d7bc2be37"
 uuid = "d8fb68d0-12a3-5cfd-a85a-d49703b185fd"
-version = "1.4.1+0"
+version = "1.4.1+1"
diff --git a/experiments/AMIP/modular/Project.toml b/experiments/AMIP/modular/Project.toml
index 1e3102b32f..d7882bdd0a 100644
--- a/experiments/AMIP/modular/Project.toml
+++ b/experiments/AMIP/modular/Project.toml
@@ -11,6 +11,7 @@ ClimaCoreTempestRemap = "d934ef94-cdd4-4710-83d6-720549644b70"
 ClimaCoupler = "4ade58fe-a8da-486c-bd89-46df092ec0c7"
 ClimaLSM = "7884a58f-fab6-4fd0-82bb-ecfedb2d8430"
 ClimaTimeSteppers = "595c0a79-7f3d-439a-bc5a-b232dc3bde79"
+ClimaUtilities = "b3f4f4ca-9299-4f7f-bd9b-81e1242a7513"
 CloudMicrophysics = "6a9e3e04-43cd-43ba-94b9-e8782df3c71b"
 Colors = "5ae59095-9a9b-59fe-a467-6f913c188581"
 Dierckx = "39dd38d3-220a-591b-8e3c-4c3a8c710a94"
diff --git a/experiments/AMIP/modular/coupler_driver_modular.jl b/experiments/AMIP/modular/coupler_driver_modular.jl
index 994318dd04..e724446cb5 100644
--- a/experiments/AMIP/modular/coupler_driver_modular.jl
+++ b/experiments/AMIP/modular/coupler_driver_modular.jl
@@ -65,6 +65,7 @@ import YAML
 using ClimaCore.Utilities: half, PlusHalf
 using ClimaCore: InputOutput, Fields
 import ClimaCore.Spaces as Spaces
+import ClimaUtilities: TimeManager
 
 if !(@isdefined parsed_args) # coupler defaults
     include("cli_options.jl")
@@ -138,10 +139,9 @@ import ClimaCoupler.Regridder:
     update_surface_fractions!, combine_surfaces!, combine_surfaces_from_sol!, dummmy_remap!, binary_mask
 import ClimaCoupler.ConservationChecker:
     EnergyConservationCheck, WaterConservationCheck, check_conservation!, plot_global_conservation
-import ClimaCoupler.Utilities: CoupledSimulation, float_type, swap_space!
+import ClimaCoupler.Utilities: CoupledSimulation, float_type, swap_space!, current_date
 import ClimaCoupler.BCReader:
     bcfile_info_init, float_type_bcf, update_midmonth_data!, next_date_in_file, interpolate_midmonth_to_daily
-import ClimaCoupler.TimeManager: current_date, datetime_to_strdate, trigger_callback, Monthly, EveryTimestep
 import ClimaCoupler.Diagnostics: get_var, init_diagnostics, accumulate_diagnostics!, save_diagnostics, TimeMean
 import ClimaCoupler.PostProcessor: postprocess
 
@@ -384,7 +384,7 @@ User can write custom diagnostics in the `user_diagnostics.jl`.
 monthly_3d_diags = init_diagnostics(
     (:T, :u, :q_tot, :q_liq_ice),
     atmos_sim.domain.center_space;
-    save = Monthly(),
+    save = TimeManager.Monthly(),
     operations = (; accumulate = TimeMean([Int(0)])),
     output_dir = COUPLER_OUTPUT_DIR,
     name_tag = "monthly_mean_3d_",
@@ -393,7 +393,7 @@ monthly_3d_diags = init_diagnostics(
 monthly_2d_diags = init_diagnostics(
     (:precipitation_rate, :toa_fluxes, :T_sfc, :tubulent_energy_fluxes),
     boundary_space;
-    save = Monthly(),
+    save = TimeManager.Monthly(),
     operations = (; accumulate = TimeMean([Int(0)])),
     output_dir = COUPLER_OUTPUT_DIR,
     name_tag = "monthly_mean_2d_",
@@ -567,18 +567,24 @@ function solve_coupler!(cs)
         import_atmos_fields!(cs.fields, cs.model_sims, cs.boundary_space, turbulent_fluxes) # radiative and/or turbulent
 
         ## monthly callbacks
-        if trigger_callback(cs, Monthly())
-            ## step to the next calendar month
-            cs.dates.date1[1] += Dates.Month(1)
-            ## checkpoint model state
-            if monthly_checkpoint
+        ## function to checkpoint model state
+        checkpoint_func =
+            (monthly_checkpoint, cs, comms_ctx, t, COUPLER_ARTIFACTS_DIR) -> if monthly_checkpoint
                 for sim in cs.model_sims
                     if get_model_state_vector(sim) !== nothing
                         checkpoint_model_state(sim, comms_ctx, Int(t), output_dir = COUPLER_ARTIFACTS_DIR)
                     end
                 end
             end
-        end
+        func_args = (monthly_checkpoint, cs, comms_ctx, t, COUPLER_ARTIFACTS_DIR)
+        ## perform monthly callback and increment `cs.dates.date1` if `cs.dates.date` passes to next month
+        TimeManager.trigger_callback(
+            cs.dates.date1[1],
+            cs.dates.date[1],
+            TimeManager.Monthly(),
+            checkpoint_func,
+            func_args,
+        )
 
     end
     @show walltime
diff --git a/src/BCReader.jl b/src/BCReader.jl
index 92a81fbed9..d7723d2ab8 100644
--- a/src/BCReader.jl
+++ b/src/BCReader.jl
@@ -7,9 +7,10 @@ monthly to daily intervals.
 """
 module BCReader
 
-using ..Utilities, ..Regridder, ..TimeManager
+using ..Utilities, ..Regridder
 using ClimaCore: Fields
 using ClimaComms
+import ClimaUtilities: TimeManager
 using Dates
 using JLD2
 
diff --git a/src/Checkpointer.jl b/src/Checkpointer.jl
index bfb0a86e65..a9d8e8c221 100644
--- a/src/Checkpointer.jl
+++ b/src/Checkpointer.jl
@@ -8,7 +8,6 @@ module Checkpointer
 using ClimaCore: Fields, InputOutput
 using ClimaCoupler: Interfacer
 using Dates
-using ClimaCoupler.TimeManager: AbstractFrequency, Monthly, EveryTimestep, trigger_callback
 using ClimaComms
 export get_model_state_vector, checkpoint_model_state, restart_model_state!
 
diff --git a/src/ClimaCoupler.jl b/src/ClimaCoupler.jl
index bcd40ca48e..7175534b6c 100644
--- a/src/ClimaCoupler.jl
+++ b/src/ClimaCoupler.jl
@@ -11,7 +11,6 @@ include("CoupledSimulations/coupled_simulation.jl")
 include("CouplerState/coupler_state.jl")
 include("../test/TestHelper.jl")
 include("Utilities.jl")
-include("TimeManager.jl")
 include("Regridder.jl")
 include("ConservationChecker.jl")
 include("BCReader.jl")
diff --git a/src/Diagnostics.jl b/src/Diagnostics.jl
index 109ddbc079..931d66e1c7 100644
--- a/src/Diagnostics.jl
+++ b/src/Diagnostics.jl
@@ -8,7 +8,7 @@ module Diagnostics
 using ClimaCore: Spaces, Fields, InputOutput
 using ClimaCoupler.Utilities: CoupledSimulation
 using Dates
-using ClimaCoupler.TimeManager: AbstractFrequency, Monthly, EveryTimestep, trigger_callback
+using ClimaUtilities.TimeManager: Monthly, EveryTimestep, trigger_callback
 using ClimaComms
 
 export get_var, init_diagnostics, accumulate_diagnostics!, save_diagnostics, TimeMean
@@ -131,13 +131,20 @@ end
 Saves all entries in `dg` in separate HDF5 files per variable in `output_dir`.
 """
 function save_diagnostics(cs::CoupledSimulation)
-    for dg in cs.diagnostics
+    # extract dates for callback condition check
+    date_cutoff = cs.dates.date1[1]
+    date_current = cs.dates.date[1]
+    # define function to perform diagnostic saving if callback is triggered
+    save_func = (cs) -> for dg in cs.diagnostics
         if trigger_callback(cs, dg.save)
             pre_save(dg.operations.accumulate, cs, dg)
             save_diagnostics(cs, dg)
             post_save(dg.operations.accumulate, cs, dg)
         end
     end
+    func_args = (cs,)
+    # perform monthly callback and increment `cs.dates.date1` if `date_current` passes to next month
+    trigger_callback(date_cutoff, date_current, Monthly(), save_func, func_args)
 end
 function save_diagnostics(cs::CoupledSimulation, dg::DiagnosticsGroup)
 
diff --git a/src/Regridder.jl b/src/Regridder.jl
index 678b3e549b..3d9b261740 100644
--- a/src/Regridder.jl
+++ b/src/Regridder.jl
@@ -8,10 +8,10 @@ via ClimaCoreTempestRemap wrappers.
 module Regridder
 
 using ..Utilities
-using ..TimeManager
 using ..Interfacer
 using ClimaCore: Meshes, Domains, Topologies, Spaces, Fields, InputOutput
 using ClimaComms
+using ClimaUtilities.TimeManager
 using NCDatasets
 using ClimaCoreTempestRemap
 using Dates
@@ -144,7 +144,7 @@ function hdwrite_regridfile_rll_to_cgll(
         if "time" in ds
             data_dates = Dates.DateTime.(ds["time"][:])
         elseif "date" in ds
-            data_dates = TimeManager.strdate_to_datetime.(string.(ds["date"][:]))
+            data_dates = strdate_to_datetime.(string.(ds["date"][:]))
         else
             @warn "No dates available in file $datafile_rll"
             data_dates = [Dates.DateTime(0)]
diff --git a/src/TimeManager.jl b/src/TimeManager.jl
deleted file mode 100644
index 51ffd098a8..0000000000
--- a/src/TimeManager.jl
+++ /dev/null
@@ -1,66 +0,0 @@
-"""
-    TimeManager
-
-This module facilitates calendar functions and temporal interpolations
-of data.
-"""
-module TimeManager
-
-using ..Utilities
-using Dates
-
-export current_date,
-    strdate_to_datetime, datetime_to_strdate, AbstractFrequency, Monthly, EveryTimestep, trigger_callback
-
-
-"""
-    current_date(cs::CoupledSimulation, t::Int)
-
-Return the model date at the current timestep.
-
-# Arguments
-- `cs`: [CoupledSimulation] containing info about the simulation
-- `t`: [Real] number of seconds since simulation began
-"""
-current_date(cs::CoupledSimulation, t::Real) = cs.dates.date0[1] + Dates.Second(t)
-
-"""
-    strdate_to_datetime(strdate::String)
-
-Convert from String ("YYYYMMDD") to Date format,
-required by the official AMIP input files.
-
-# Arguments
-- `strdate`: [String] to be converted to Date type
-"""
-strdate_to_datetime(strdate::String) =
-    Dates.DateTime(parse(Int, strdate[1:4]), parse(Int, strdate[5:6]), parse(Int, strdate[7:8]))
-
-"""
-    datetime_to_strdate(datetime::DateTime)
-
-Convert from Date to String ("YYYYMMDD") format.
-
-# Arguments
-- `datetime`: [DateTime] object to be converted to string
-"""
-datetime_to_strdate(datetime::DateTime) =
-    string(lpad(Dates.year(datetime), 4, "0")) *
-    string(string(lpad(Dates.month(datetime), 2, "0"))) *
-    string(lpad(Dates.day(datetime), 2, "0"))
-
-abstract type AbstractFrequency end
-struct Monthly <: AbstractFrequency end
-struct EveryTimestep <: AbstractFrequency end
-
-"""
-    trigger_callback(cs, ::Monthly)
-
-Returns `true` if the current date is equal to or exceeds the saved first of the month at time of 00:00:00.
-
-# Arguments
-- `cs`: [CoupledSimulation] containing info about the simulation
-"""
-trigger_callback(cs::CoupledSimulation, ::Monthly) = cs.dates.date[1] >= cs.dates.date1[1] ? true : false
-
-end
diff --git a/src/Utilities.jl b/src/Utilities.jl
index 5d24753067..f085e458b1 100644
--- a/src/Utilities.jl
+++ b/src/Utilities.jl
@@ -7,8 +7,9 @@ modules in the coupler.
 module Utilities
 
 using ClimaCore: Fields, Spaces
+using Dates
 
-export CoupledSimulation, float_type, swap_space!
+export CoupledSimulation, float_type, swap_space!, current_date
 
 """
     AbstractSimulation
@@ -74,4 +75,15 @@ function swap_space!(field_out, field_in::Fields.Field)
     return field_out
 end
 
+"""
+    current_date(cs::CoupledSimulation, t::Int)
+
+Return the model date at the current timestep.
+
+# Arguments
+- `cs`: [CoupledSimulation] containing info about the simulation
+- `t`: [Real] number of seconds since simulation began
+"""
+current_date(cs::CoupledSimulation, t::Real) = cs.dates.date0[1] + Dates.Second(t)
+
 end # module
diff --git a/test/Project.toml b/test/Project.toml
index 9b8e729038..fe58fd220f 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -7,6 +7,7 @@ ClimaCore = "d414da3d-4745-48bb-8d80-42e94e092884"
 ClimaCoupler = "4ade58fe-a8da-486c-bd89-46df092ec0c7"
 ClimaLSM = "7884a58f-fab6-4fd0-82bb-ecfedb2d8430"
 ClimaTimeSteppers = "595c0a79-7f3d-439a-bc5a-b232dc3bde79"
+ClimaUtilities = "b3f4f4ca-9299-4f7f-bd9b-81e1242a7513"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 Downloads = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
 IntervalSets = "8197267c-284f-5f27-9208-e0e47529a953"
diff --git a/test/bcreader_tests.jl b/test/bcreader_tests.jl
index bfaf495fc1..bf5a9fb124 100644
--- a/test/bcreader_tests.jl
+++ b/test/bcreader_tests.jl
@@ -2,9 +2,10 @@
     Unit tests for ClimaCoupler BCReader module
 =#
 
-using ClimaCoupler: Regridder, BCReader, TimeManager, Utilities
+using ClimaCoupler: Regridder, BCReader, Utilities
 using ClimaCore: Fields, Meshes, Domains, Topologies, Spaces
 using ClimaComms
+using ClimaUtilities: TimeManager
 using Test
 using Dates
 using NCDatasets
@@ -198,7 +199,7 @@ for FT in (Float32, Float64)
 
             # step in time
             walltime = @elapsed for t in ((tspan[1] + Δt):Δt:tspan[end])
-                cs_t.dates.date[1] = TimeManager.current_date(cs_t, t) # if not global, `date`` is not updated. Check that this still runs when distributed.
+                cs_t.dates.date[1] = Utilities.current_date(cs_t, t) # if not global, `date`` is not updated. Check that this still runs when distributed.
 
                 model_date = cs_t.dates.date[1]
                 callback_date = BCReader.next_date_in_file(bcf_info)
diff --git a/test/diagnostics_tests.jl b/test/diagnostics_tests.jl
index 741b8592d5..2659e4c4a0 100644
--- a/test/diagnostics_tests.jl
+++ b/test/diagnostics_tests.jl
@@ -5,8 +5,8 @@ using Test
 using Dates
 using ClimaCore: InputOutput
 using ClimaComms
+using ClimaUtilities.TimeManager: Monthly, EveryTimestep
 using ClimaCoupler: Utilities
-using ClimaCoupler.TimeManager: EveryTimestep, Monthly
 using ClimaCoupler.TestHelper: create_space
 import ClimaCoupler.Diagnostics:
     get_var,
diff --git a/test/mpi_tests/bcreader_mpi_tests.jl b/test/mpi_tests/bcreader_mpi_tests.jl
index 119de1c941..5945b552a9 100644
--- a/test/mpi_tests/bcreader_mpi_tests.jl
+++ b/test/mpi_tests/bcreader_mpi_tests.jl
@@ -8,6 +8,7 @@ that MPI can be enabled for testing of these functions.
 using ClimaCoupler: Regridder, BCReader, TimeManager, Utilities
 using ClimaCore: Fields, Meshes, Domains, Topologies, Spaces
 using ClimaComms
+import ClimaUtilities: TimeManager
 using Test
 using Dates
 using NCDatasets
@@ -146,7 +147,7 @@ end
 
         # step in time
         walltime = @elapsed for t in ((tspan[1] + Δt):Δt:tspan[end])
-            cs_t.dates.date[1] = TimeManager.current_date(cs_t, t) # if not global, `date`` is not updated. Check that this still runs when distributed.
+            cs_t.dates.date[1] = Utilities.current_date(cs_t, t) # if not global, `date`` is not updated. Check that this still runs when distributed.
 
             model_date = cs_t.dates.date[1]
             callback_date = BCReader.next_date_in_file(bcf_info)
diff --git a/test/runtests.jl b/test/runtests.jl
index 3999d83a97..d4a2634e8d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -21,9 +21,6 @@ end
 @safetestset "Utilities tests" begin
     include("utilities_tests.jl")
 end
-@safetestset "TimeManager tests" begin
-    include("time_manager_tests.jl")
-end
 @safetestset "FieldExchanger tests" begin
     include("field_exchanger_tests.jl")
 end
diff --git a/test/time_manager_tests.jl b/test/time_manager_tests.jl
deleted file mode 100644
index bb711e2e41..0000000000
--- a/test/time_manager_tests.jl
+++ /dev/null
@@ -1,70 +0,0 @@
-#= 
-    Unit tests for ClimaCoupler TimeManager module
-=#
-
-using Test
-using Dates
-using ClimaCoupler: Utilities, TimeManager
-using ClimaComms
-
-for FT in (Float32, Float64)
-    @testset "test current_date" begin
-        date0 = date = DateTime("19790321", dateformat"yyyymmdd")
-        dates = (; date = [date], date0 = [date0], date1 = [Dates.firstdayofmonth(date0)])
-        tspan = (Int(1), Int(90 * 86400)) # Jan-Mar
-        Δt_cpl = 1 * 24 * 3600
-
-        # Fill in only the necessary parts of the simulation
-        cs = Utilities.CoupledSimulation{FT}(
-            ClimaComms.SingletonCommsContext(), # comms_ctx
-            dates, # dates
-            nothing, # boundary_space
-            nothing, # fields
-            nothing, # parsed_args
-            nothing, # conservation_checks
-            tspan, # tspan
-            Int(0), # t
-            Int(Δt_cpl), # Δt_cpl
-            (;), # surface_masks
-            (;), # model_sims
-            (;), # mode
-            (), # diagnostics
-        )
-
-        for t in ((tspan[1] + Δt_cpl):Δt_cpl:tspan[end])
-            @test TimeManager.current_date(cs, t) == date0 + Dates.Second(t)
-        end
-    end
-end
-
-@testset "test strdate_to_datetime" begin
-    @test TimeManager.strdate_to_datetime("19000101") == Dates.DateTime(1900, 1, 1)
-    @test TimeManager.strdate_to_datetime("00000101") == Dates.DateTime(0, 1, 1)
-end
-
-@testset "test datetime_to_strdate" begin
-    @test TimeManager.datetime_to_strdate(Dates.DateTime(1900, 1, 1)) == "19000101"
-    @test TimeManager.datetime_to_strdate(Dates.DateTime(0, 1, 1)) == "00000101"
-end
-
-@testset "trigger_callback" begin
-    date0 = date = DateTime("19790321", dateformat"yyyymmdd")
-    dates = (; date = [date], date0 = [date0], date1 = [Dates.firstdayofmonth(date0)])
-
-    cs = Utilities.CoupledSimulation{Float64}(
-        nothing, # comms_ctx
-        dates, # dates
-        nothing, # boundary_space
-        nothing, # fields
-        nothing, # parsed_args
-        nothing, # conservation_checks
-        (Int(0), Int(1000)), # tspan
-        Int(200), # t
-        Int(200), # Δt_cpl
-        (;), # surface_masks
-        (;), # model_sims
-        (;), # mode
-        (), # diagnostics
-    )
-    @test TimeManager.trigger_callback(cs, TimeManager.Monthly()) == true
-end
diff --git a/test/utilities_tests.jl b/test/utilities_tests.jl
index e26a9f8959..e87c30cd7b 100644
--- a/test/utilities_tests.jl
+++ b/test/utilities_tests.jl
@@ -2,7 +2,9 @@
     Unit tests for ClimaCoupler Utilities module
 =#
 
+import Dates
 using Test
+import ClimaComms
 using ClimaCoupler: Utilities, TestHelper
 using ClimaCore: Fields
 
@@ -39,4 +41,32 @@ for FT in (Float32, Float64)
         @test parent(field1) == parent(field2)
         @test axes(field2) == space2
     end
+
+    @testset "test current_date" begin
+        date0 = date = Dates.DateTime("19790321", Dates.dateformat"yyyymmdd")
+        dates = (; date = [date], date0 = [date0], date1 = [Dates.firstdayofmonth(date0)])
+        tspan = (Int(1), Int(90 * 86400)) # Jan-Mar
+        Δt_cpl = 1 * 24 * 3600
+
+        # Fill in only the necessary parts of the simulation
+        cs = Utilities.CoupledSimulation{FT}(
+            ClimaComms.SingletonCommsContext(), # comms_ctx
+            dates, # dates
+            nothing, # boundary_space
+            nothing, # fields
+            nothing, # parsed_args
+            nothing, # conservation_checks
+            tspan, # tspan
+            Int(0), # t
+            Int(Δt_cpl), # Δt_cpl
+            (;), # surface_masks
+            (;), # model_sims
+            (;), # mode
+            (), # diagnostics
+        )
+
+        for t in ((tspan[1] + Δt_cpl):Δt_cpl:tspan[end])
+            @test Utilities.current_date(cs, t) == date0 + Dates.Second(t)
+        end
+    end
 end