"Tue, 21 May 2024 18:15:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
18:15:01
General datetime
2024-05-21 18:15:01Z
For Database
2024-05-21 18:15:01
For HTTP1.1
Tue, 21 May 2024 18:15:01 GMT