"Sat, 29 Jun 2024 21:21:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240629
Only TIME
21:21:37
General datetime
2024-06-29 21:21:37Z
For Database
2024-06-29 21:21:37
For HTTP1.1
Sat, 29 Jun 2024 21:21:37 GMT