"Sat, 18 May 2024 14:12:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
14:12:56
General datetime
2024-05-18 14:12:56Z
For Database
2024-05-18 14:12:56
For HTTP1.1
Sat, 18 May 2024 14:12:56 GMT