"Sat, 18 May 2024 18:23:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
18:23:42
General datetime
2024-05-18 18:23:42Z
For Database
2024-05-18 18:23:42
For HTTP1.1
Sat, 18 May 2024 18:23:42 GMT