"Mon, 27 May 2024 20:15:10"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240527
Only TIME
20:15:10
General datetime
2024-05-27 20:15:10Z
For Database
2024-05-27 20:15:10
For HTTP1.1
Mon, 27 May 2024 20:15:10 GMT