"Sat, 18 May 2024 19:17:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
19:17:23
General datetime
2024-05-18 19:17:23Z
For Database
2024-05-18 19:17:23
For HTTP1.1
Sat, 18 May 2024 19:17:23 GMT