"Mon, 14 Jul 2025 14:45:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250714
Only TIME
14:45:21
General datetime
2025-07-14 14:45:21Z
For Database
2025-07-14 14:45:21
For HTTP1.1
Mon, 14 Jul 2025 14:45:21 GMT