diff --git a/packages/effect/src/DateTime.ts b/packages/effect/src/DateTime.ts
index 5f11606c891..3a084203538 100644
--- a/packages/effect/src/DateTime.ts
+++ b/packages/effect/src/DateTime.ts
@@ -938,6 +938,14 @@ export const zonedOffsetIso: (self: Zoned) => string = Internal.zonedOffsetIso
  */
 export const toEpochMillis: (self: DateTime) => number = Internal.toEpochMillis
 
+/**
+ * Get the seconds since the Unix epoch of a `DateTime`.
+ *
+ * @since 3.16.0
+ * @category conversions
+ */
+export const toEpochSeconds: (self: DateTime) => number = Internal.toEpochSeconds
+
 /**
  * Remove the time aspect of a `DateTime`, first adjusting for the time
  * zone. It will return a `DateTime.Utc` only containing the date.
diff --git a/packages/effect/src/internal/dateTime.ts b/packages/effect/src/internal/dateTime.ts
index 544ecd86efa..a20b3942e1b 100644
--- a/packages/effect/src/internal/dateTime.ts
+++ b/packages/effect/src/internal/dateTime.ts
@@ -613,6 +613,9 @@ export const zonedOffsetIso = (self: DateTime.Zoned): string => offsetToString(z
 /** @internal */
 export const toEpochMillis = (self: DateTime.DateTime): number => self.epochMillis
 
+/** @internal */
+export const toEpochSeconds = (self: DateTime.DateTime): number => Math.floor(self.epochMillis / 1000)
+
 /** @internal */
 export const removeTime = (self: DateTime.DateTime): DateTime.Utc =>
   withDate(self, (date) => {