"Sat, 18 May 2024 18:23:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
18:23:17
General datetime
2024-05-18 18:23:17Z
For Database
2024-05-18 18:23:17
For HTTP1.1
Sat, 18 May 2024 18:23:17 GMT