diff --git a/web/src/utils/determine-time-range.test.ts b/web/src/utils/determine-time-range.test.ts
new file mode 100644
index 0000000000..8678679c0d
--- /dev/null
+++ b/web/src/utils/determine-time-range.test.ts
@@ -0,0 +1,139 @@
+import dayjs from "dayjs";
+import { InsightRange } from "~/queries/insight/insight.config";
+import { InsightResolution } from "~~/model/insight_pb";
+import { determineTimeRange } from "./determine-time-range";
+
+beforeAll(() => {
+  jest.useFakeTimers();
+  jest.setSystemTime(new Date("2024-06-15T12:00:00.000Z"));
+});
+
+afterAll(() => {
+  jest.useRealTimers();
+});
+
+describe("determineTimeRange", () => {
+  describe("DAILY resolution", () => {
+    it("determines time range for LAST_1_WEEK", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_WEEK,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-06-09T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_1_MONTH", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_MONTH,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-05-16T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_3_MONTHS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_3_MONTHS,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-03-16T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_6_MONTHS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_6_MONTHS,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2023-12-16T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_1_YEAR", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_YEAR,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2023-06-16T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_2_YEARS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_2_YEARS,
+        InsightResolution.DAILY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2022-06-16T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+  });
+
+  describe("MONTHLY resolution", () => {
+    it("determines time range for LAST_1_WEEK (maps to month-to-date)", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_WEEK,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-06-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_1_MONTH (maps to month-to-date)", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_MONTH,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-06-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_3_MONTHS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_3_MONTHS,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-04-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_6_MONTHS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_6_MONTHS,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2024-01-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_1_YEAR", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_1_YEAR,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2023-07-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+
+    it("determines time range for LAST_2_YEARS", () => {
+      const [from, to] = determineTimeRange(
+        InsightRange.LAST_2_YEARS,
+        InsightResolution.MONTHLY
+      );
+
+      expect(dayjs(from).toISOString()).toBe("2022-07-01T00:00:00.000Z");
+      expect(dayjs(to).toISOString()).toBe("2024-06-15T23:59:59.999Z");
+    });
+  });
+});