"Mon, 15 Jul 2024 14:18:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240715
Only TIME
14:18:21
General datetime
2024-07-15 14:18:21Z
For Database
2024-07-15 14:18:21
For HTTP1.1
Mon, 15 Jul 2024 14:18:21 GMT