"Mon, 27 May 2024 20:20:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240527
Only TIME
20:20:15
General datetime
2024-05-27 20:20:15Z
For Database
2024-05-27 20:20:15
For HTTP1.1
Mon, 27 May 2024 20:20:15 GMT