"Sat, 18 May 2024 13:19:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
13:19:11
General datetime
2024-05-18 13:19:11Z
For Database
2024-05-18 13:19:11
For HTTP1.1
Sat, 18 May 2024 13:19:11 GMT