"Tue, 21 May 2024 20:15:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
20:15:00
General datetime
2024-05-21 20:15:00Z
For Database
2024-05-21 20:15:00
For HTTP1.1
Tue, 21 May 2024 20:15:00 GMT