first commit

utils/periodUtils.ts

@@ -0,0 +1,16 @@
+export interface Period {
+  start?: Date
+  end?: Date
+}
+
+export function isPeriodActive(period?: Period): boolean {
+  if (!period) return true // No period means always active
+  const now = new Date()
+  const start = period.start ? new Date(period.start) : null
+  const end = period.end ? new Date(period.end) : null
+
+  const isAfterStart = !start || now >= start
+  const isBeforeEnd = !end || now <= end
+
+  return isAfterStart && isBeforeEnd
+}