"Tue, 21 May 2024 18:15:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
18:15:11
General datetime
2024-05-21 18:15:11Z
For Database
2024-05-21 18:15:11
For HTTP1.1
Tue, 21 May 2024 18:15:11 GMT