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