"Sun, 19 May 2024 20:15:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240519
Only TIME
20:15:12
General datetime
2024-05-19 20:15:12Z
For Database
2024-05-19 20:15:12
For HTTP1.1
Sun, 19 May 2024 20:15:12 GMT