diff --git a/doc/JSON_INFO.md b/doc/JSON_INFO.md
index 6055fb7bc427e..6a0115d3504b8 100644
--- a/doc/JSON_INFO.md
+++ b/doc/JSON_INFO.md
@@ -514,21 +514,25 @@ The syntax listed here is still valid.
 
 #### Group definition
 
-| Identifier | Description
-|---         |---
-| `name`     | Unique ID. Must be one continuous word, use underscores if necessary.
-| `default`  | Default monster, automatically fills in any remaining spawn chances.
-| `monsters` | To choose a monster for spawning, the game creates 1000 entries and picks one. Each monster will have a number of entries equal to it's "freq" and the default monster will fill in the remaining. See the table below for how to build the single monster definitions.
+| Identifier  | Description
+|---          |---
+| `name`      | Unique ID. Must be one continuous word, use underscores if necessary.
+| `default`   | Default monster, automatically fills in any remaining spawn chances.
+| `monsters`  | To choose a monster for spawning, the game creates 1000 entries and picks one. Each monster will have a number of entries equal to it's "freq" and the default monster will fill in the remaining. See the table below for how to build the single monster definitions.
+| `is_safe`   | (bool) Check to not trigger safe-mode warning.
+| `is_animal` | (bool) Check if that group has only normal animals. 
 
 #### Monster definition
 
-| Identifier   | Description
-|---           |---
-| `monster`    | The monster's id.
-| `freq`       | Chance of occurrence, out of a thousand.
-| `multiplier` | How many monsters each monster in this definition should count as, if spawning a limited number of monsters.
-| `pack_size`  | (_optional_) The minimum and maximum number of monsters in this group that should spawn together.  (default: `[1,1]`)
-| `conditions` | Conditions limit when monsters spawn. Valid options: `SUMMER`, `WINTER`, `AUTUMN`, `SPRING`, `DAY`, `NIGHT`, `DUSK`, `DAWN`. Multiple Time-of-day conditions (`DAY`, `NIGHT`, `DUSK`, `DAWN`) will be combined together so that any of those conditions makes the spawn valid. Multiple Season conditions (`SUMMER`, `WINTER`, `AUTUMN`, `SPRING`) will be combined together so that any of those conditions makes the spawn valid.
+| Identifier        | Description
+|---                |---
+| `monster`         | The monster's id.
+| `freq`            | Chance of occurrence, x/1000.
+| `cost_multiplier` | How many monsters each monster in this definition should count as, if spawning a limited number of monsters.
+| `pack_size`       | (_optional_) The minimum and maximum number of monsters in this group that should spawn together.  (default: `[1,1]`)
+| `conditions`      | Conditions limit when monsters spawn. Valid options: `SUMMER`, `WINTER`, `AUTUMN`, `SPRING`, `DAY`, `NIGHT`, `DUSK`, `DAWN`. Multiple Time-of-day conditions (`DAY`, `NIGHT`, `DUSK`, `DAWN`) will be combined together so that any of those conditions makes the spawn valid. Multiple Season conditions (`SUMMER`, `WINTER`, `AUTUMN`, `SPRING`) will be combined together so that any of those conditions makes the spawn valid.
+| `starts`          | (_optional_) This entry becomes active after this time. (Measured in hours)
+| `ends`            | (_optional_) This entry becomes inactive after this time. (Measured in hours)
 
 ```C++
 {