diff --git a/tubesync/common/timestamp.py b/tubesync/common/timestamp.py
new file mode 100644
index 00000000..833c488f
--- /dev/null
+++ b/tubesync/common/timestamp.py
@@ -0,0 +1,35 @@
+import datetime
+from django.utils import timezone
+
+
+posix_epoch = datetime.datetime.utcfromtimestamp(0)
+utc_tz = datetime.timezone.utc
+
+
+def add_epoch(seconds):
+    assert seconds is not None
+    assert seconds >= 0, 'seconds must be a positive number'
+
+    return timedelta(seconds=seconds) + posix_epoch
+
+def subtract_epoch(arg_dt, /):
+    epoch = posix_epoch.astimezone(utc_tz)
+    utc_dt = arg_dt.astimezone(utc_tz)
+
+    return utc_dt - epoch
+
+def datetime_to_timestamp(arg_dt, /):
+    timestamp = subtract_epoch(arg_dt).total_seconds()
+
+    try:
+        timestamp_int = int(timestamp)
+    except (TypeError, ValueError,):
+        pass
+    else:
+        return timestamp_int
+
+    return timestamp
+
+def timestamp_to_datetime(seconds, /):
+    return add_epoch(seconds=seconds).astimezone(utc_tz)
+