"Tue, 21 May 2024 18:21:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
18:21:19
General datetime
2024-05-21 18:21:19Z
For Database
2024-05-21 18:21:19
For HTTP1.1
Tue, 21 May 2024 18:21:19 GMT