"Tue, 21 May 2024 23:18:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
23:18:47
General datetime
2024-05-21 23:18:47Z
For Database
2024-05-21 23:18:47
For HTTP1.1
Tue, 21 May 2024 23:18:47 GMT