diff --git a/locust/stats.py b/locust/stats.py
index 16e6df91b3..52c76767b8 100644
--- a/locust/stats.py
+++ b/locust/stats.py
@@ -919,6 +919,7 @@ def update_stats_history(runner: Runner) -> None:
         "current_fail_per_sec": [timestamp, stats.total.current_fail_per_sec or 0],
         "total_avg_response_time": [timestamp, proper_round(stats.total.avg_response_time, digits=2)],
         "user_count": [timestamp, runner.user_count or 0],
+        "time": timestamp,
     }
     stats.history.append(r)
 
diff --git a/locust/web.py b/locust/web.py
index 072a2e385f..6c4d54a6b8 100644
--- a/locust/web.py
+++ b/locust/web.py
@@ -618,8 +618,6 @@ def update_template_args(self):
             else None
         )
 
-        start_time = format_utc_timestamp(stats.start_time)
-
         self.template_args = {
             "locustfile": self.environment.locustfile,
             "state": self.environment.runner.state,
@@ -637,7 +635,6 @@ def update_template_args(self):
                 and not (self.userclass_picker_is_active or self.environment.shape_class.use_common_options)
             ),
             "stats_history_enabled": options and options.stats_history_enabled,
-            "start_time": start_time,
             "tasks": dumps({}),
             "extra_options": extra_options,
             "run_time": options and options.run_time,
diff --git a/locust/webui/src/components/LineChart/LineChart.tsx b/locust/webui/src/components/LineChart/LineChart.tsx
index 04d6fafe51..4454cea644 100644
--- a/locust/webui/src/components/LineChart/LineChart.tsx
+++ b/locust/webui/src/components/LineChart/LineChart.tsx
@@ -2,7 +2,11 @@ import { useEffect, useState, useRef } from 'react';
 import { init, dispose, ECharts, connect } from 'echarts';
 
 import { CHART_THEME } from 'components/LineChart/LineChart.constants';
-import { ILineChart, ILineChartMarkers } from 'components/LineChart/LineChart.types';
+import {
+  ILineChart,
+  ILineChartMarkers,
+  ILineChartTimeAxis,
+} from 'components/LineChart/LineChart.types';
 import {
   createMarkLine,
   createOptions,
@@ -11,7 +15,9 @@ import {
 } from 'components/LineChart/LineChart.utils';
 import { useSelector } from 'redux/hooks';
 
-interface IBaseChartType extends ILineChartMarkers {}
+interface IBaseChartType extends ILineChartMarkers, ILineChartTimeAxis {
+  [key: string]: any;
+}
 
 export default function LineChart<ChartType extends IBaseChartType>({
   charts,
diff --git a/locust/webui/src/components/LineChart/LineChart.types.ts b/locust/webui/src/components/LineChart/LineChart.types.ts
index c04567181a..ddd73782b7 100644
--- a/locust/webui/src/components/LineChart/LineChart.types.ts
+++ b/locust/webui/src/components/LineChart/LineChart.types.ts
@@ -25,6 +25,10 @@ export interface ILineChartMarkers {
   markers?: string[];
 }
 
+export interface ILineChartTimeAxis {
+  time: string[];
+}
+
 export interface ILineChartTooltipFormatterParams {
   axisValue: string;
   color: string;
diff --git a/locust/webui/src/components/LineChart/LineChart.utils.ts b/locust/webui/src/components/LineChart/LineChart.utils.ts
index 2e134e398a..5a7741c3ae 100644
--- a/locust/webui/src/components/LineChart/LineChart.utils.ts
+++ b/locust/webui/src/components/LineChart/LineChart.utils.ts
@@ -12,7 +12,6 @@ import {
   ILineChartZoomEvent,
   ILineChartTooltipFormatterParams,
 } from 'components/LineChart/LineChart.types';
-import { swarmTemplateArgs } from 'constants/swarm';
 import { ICharts } from 'types/ui.types';
 import { formatLocaleString } from 'utils/date';
 import { padStart } from 'utils/number';
@@ -81,7 +80,7 @@ const renderChartTooltipValue = <ChartType>({
   return Array.isArray(value) ? value[1] : value;
 };
 
-export const createOptions = <ChartType>({
+export const createOptions = <ChartType extends Pick<ICharts, 'time'>>({
   charts,
   title,
   lines,
@@ -126,7 +125,7 @@ export const createOptions = <ChartType>({
   },
   xAxis: {
     type: 'time',
-    startValue: swarmTemplateArgs.startTime,
+    startValue: charts.time[0],
     axisLabel: {
       formatter: formatTimeAxis,
     },
diff --git a/locust/webui/src/components/LineChart/tests/LineChart.mocks.ts b/locust/webui/src/components/LineChart/tests/LineChart.mocks.ts
index 2f41b0152e..9bee9d3342 100644
--- a/locust/webui/src/components/LineChart/tests/LineChart.mocks.ts
+++ b/locust/webui/src/components/LineChart/tests/LineChart.mocks.ts
@@ -1,6 +1,6 @@
 import { ICharts } from 'types/ui.types';
 
-export type MockChartType = Pick<ICharts, 'currentRps' | 'currentFailPerSec'>;
+export type MockChartType = Pick<ICharts, 'currentRps' | 'currentFailPerSec' | 'time'>;
 
 export const mockChartLines = [
   { name: 'RPS', key: 'currentRps' as keyof MockChartType },
@@ -22,6 +22,13 @@ export const mockCharts: MockChartType = {
     ['Tue, 06 Aug 2024 11:33:12 GMT', 0],
     ['Tue, 06 Aug 2024 11:33:14 GMT', 0],
   ],
+  time: [
+    'Tue, 06 Aug 2024 11:33:02 GMT',
+    'Tue, 06 Aug 2024 11:33:08 GMT',
+    'Tue, 06 Aug 2024 11:33:10 GMT',
+    'Tue, 06 Aug 2024 11:33:12 GMT',
+    'Tue, 06 Aug 2024 11:33:14 GMT',
+  ],
 };
 
 export const mockTimestamps = [
diff --git a/locust/webui/src/components/LineChart/tests/LineChartUtils.test.tsx b/locust/webui/src/components/LineChart/tests/LineChartUtils.test.tsx
index a60291de55..269c604d7b 100644
--- a/locust/webui/src/components/LineChart/tests/LineChartUtils.test.tsx
+++ b/locust/webui/src/components/LineChart/tests/LineChartUtils.test.tsx
@@ -18,7 +18,6 @@ import {
   mockTimestamps,
   mockTooltipParams,
 } from 'components/LineChart/tests/LineChart.mocks';
-import { swarmStateMock } from 'test/mocks/swarmState.mock';
 import { formatLocaleString } from 'utils/date';
 
 const removeWhitespace = (string: string) => string.replace(/\s+/g, '');
@@ -60,7 +59,7 @@ describe('createOptions', () => {
 
     expect(options.title.text).toBe('Test Chart');
     expect(options.xAxis.type).toBe('time');
-    expect(options.xAxis.startValue).toBe(swarmStateMock.startTime);
+    expect(options.xAxis.startValue).toBe(mockCharts.time[0]);
     expect(options.yAxis).toEqual(defaultYAxis);
     expect(options.series).toEqual(mockSeriesData);
     expect(options.color).toEqual(['#fff']);
@@ -188,7 +187,7 @@ describe('createOptions', () => {
     expect(options.title.text).toBe('Test Chart');
     expect(options.yAxis).toEqual(defaultYAxis);
     expect(options.xAxis.type).toBe('time');
-    expect(options.xAxis.startValue).toBe(swarmStateMock.startTime);
+    expect(options.xAxis.startValue).toBe(mockCharts.time[0]);
     expect(options.series).toEqual(mockScatterplotSeriesData);
     expect(options.color).toEqual(['#fff']);
   });
diff --git a/locust/webui/src/hooks/useSwarmUi.ts b/locust/webui/src/hooks/useSwarmUi.ts
index a0f37d07ba..1fbfcadd87 100644
--- a/locust/webui/src/hooks/useSwarmUi.ts
+++ b/locust/webui/src/hooks/useSwarmUi.ts
@@ -70,6 +70,7 @@ export default function useSwarmUi() {
       currentFailPerSec: [time, totalFailPerSecRounded],
       totalAvgResponseTime: [time, roundToDecimalPlaces(totalAvgResponseTime, 2)],
       userCount: [time, userCount],
+      time,
     };
 
     setUi({
diff --git a/locust/webui/src/redux/slice/swarm.slice.ts b/locust/webui/src/redux/slice/swarm.slice.ts
index 83560b6917..718238c627 100644
--- a/locust/webui/src/redux/slice/swarm.slice.ts
+++ b/locust/webui/src/redux/slice/swarm.slice.ts
@@ -26,7 +26,6 @@ export interface ISwarmState {
   runTime?: string | number;
   showUserclassPicker: boolean;
   spawnRate: number | null;
-  startTime: string;
   state: string;
   statsHistoryEnabled: boolean;
   tasks: string;
diff --git a/locust/webui/src/redux/slice/tests/ui.slice.test.ts b/locust/webui/src/redux/slice/tests/ui.slice.test.ts
index dcc9b86f57..dc87e2837c 100644
--- a/locust/webui/src/redux/slice/tests/ui.slice.test.ts
+++ b/locust/webui/src/redux/slice/tests/ui.slice.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, test } from 'vitest';
 
 import uiSlice, { IUiState, UiAction, uiActions } from 'redux/slice/ui.slice';
-import { percentilesToChart, swarmStateMock } from 'test/mocks/swarmState.mock';
+import { percentilesToChart } from 'test/mocks/swarmState.mock';
 import { ICharts, ISwarmRatios } from 'types/ui.types';
 
 const responseTimePercentileKey1 =
@@ -12,6 +12,7 @@ const responseTimePercentileKey2 =
 const initialState = {
   totalRps: 0,
   failRatio: 0,
+  startTime: '',
   stats: [],
   errors: [],
   exceptions: [],
@@ -22,6 +23,7 @@ const initialState = {
     currentFailPerSec: [],
     totalAvgResponseTime: [],
     userCount: [],
+    time: [],
   },
   ratios: {} as ISwarmRatios,
   userCount: 0,
@@ -88,6 +90,7 @@ describe('uiSlice', () => {
         ...initialState,
         charts: {
           ...initialState.charts,
+          time: ['10:10:10'],
         },
       },
       action,
@@ -95,7 +98,7 @@ describe('uiSlice', () => {
 
     const charts = nextState.charts as ICharts;
 
-    expect(charts.markers).toEqual([swarmStateMock.startTime, '20:20:20']);
+    expect(charts.markers).toEqual(['10:10:10', '20:20:20']);
 
     // Add space between runs
     expect(charts.currentRps[0]).toEqual({ value: null });
diff --git a/locust/webui/src/redux/slice/ui.slice.ts b/locust/webui/src/redux/slice/ui.slice.ts
index f8e1ffaeee..c85c1d60f6 100644
--- a/locust/webui/src/redux/slice/ui.slice.ts
+++ b/locust/webui/src/redux/slice/ui.slice.ts
@@ -17,6 +17,7 @@ export interface IUiState {
   extendedStats?: IExtendedStat[];
   totalRps: number;
   failRatio: number;
+  startTime: string;
   stats: ISwarmStat[];
   errors: ISwarmError[];
   workers?: ISwarmWorker[];
@@ -31,6 +32,7 @@ export type UiAction = PayloadAction<Partial<IUiState>>;
 const initialState = {
   totalRps: 0,
   failRatio: 0,
+  startTime: '',
   stats: [] as ISwarmStat[],
   errors: [] as ISwarmError[],
   exceptions: [] as ISwarmException[],
@@ -54,6 +56,7 @@ const addSpaceToChartsBetweenTests = (charts: ICharts) => {
     currentFailPerSec: { value: null },
     totalAvgResponseTime: { value: null },
     userCount: { value: null },
+    time: '',
   });
 };
 
@@ -73,7 +76,7 @@ const uiSlice = createSlice({
           ...addSpaceToChartsBetweenTests(state.charts as ICharts),
           markers: (state.charts as ICharts).markers
             ? [...((state.charts as ICharts).markers as string[]), payload]
-            : [swarmTemplateArgs.startTime, payload],
+            : [state.charts.time[0], payload],
         },
       };
     },
diff --git a/locust/webui/src/test/mocks/statsRequest.mock.ts b/locust/webui/src/test/mocks/statsRequest.mock.ts
index 0ad4dfb08e..7ccc3e3ea6 100644
--- a/locust/webui/src/test/mocks/statsRequest.mock.ts
+++ b/locust/webui/src/test/mocks/statsRequest.mock.ts
@@ -155,6 +155,7 @@ export const statsResponseTransformed = {
     currentFailPerSec: [[mockDate.toISOString(), 1932.5]],
     userCount: [[mockDate.toISOString(), 1]],
     totalAvgResponseTime: [[mockDate.toISOString(), 0.41]],
+    time: [],
   } as ICharts,
   ratios: {
     perClass: {
diff --git a/locust/webui/src/test/mocks/swarmState.mock.ts b/locust/webui/src/test/mocks/swarmState.mock.ts
index 9a409d06b0..92caac14a1 100644
--- a/locust/webui/src/test/mocks/swarmState.mock.ts
+++ b/locust/webui/src/test/mocks/swarmState.mock.ts
@@ -22,7 +22,6 @@ export const swarmStateMock = {
   showUserclassPicker: false,
   spawnRate: null,
   state: 'ready',
-  startTime: '10:10:10',
   percentilesToChart: percentilesToChart,
   statsHistoryEnabled: false,
   tasks: '{}',
@@ -48,5 +47,6 @@ export const swarmReportMock: IReport = {
     currentFailPerSec: [['', 0]],
     totalAvgResponseTime: [['', 0]],
     userCount: [['', 0]],
+    time: [],
   },
 };
diff --git a/locust/webui/src/types/swarm.types.ts b/locust/webui/src/types/swarm.types.ts
index 94eb963936..4f899cce78 100644
--- a/locust/webui/src/types/swarm.types.ts
+++ b/locust/webui/src/types/swarm.types.ts
@@ -26,6 +26,7 @@ export interface IHistory {
     [key: `responseTimePercentile${number}`]: [string, number | null];
   };
   totalAvgResponseTime: [string, number];
+  time: string;
 }
 
 export interface IReport {
diff --git a/locust/webui/src/types/ui.types.ts b/locust/webui/src/types/ui.types.ts
index a7a2f4a720..7311304f73 100644
--- a/locust/webui/src/types/ui.types.ts
+++ b/locust/webui/src/types/ui.types.ts
@@ -60,6 +60,7 @@ export interface ICharts extends ILineChartMarkers {
   [key: `responseTimePercentile${number}`]: ([string, number | null] | NullChartValue)[];
   totalAvgResponseTime: ([string, number] | NullChartValue)[];
   userCount: ([string, number] | NullChartValue)[];
+  time: string[];
 }
 
 export interface IClassRatio {