"Sun, 21 Apr 2024 06:23:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
06:23:04
General datetime
2024-04-21 06:23:04Z
For Database
2024-04-21 06:23:04
For HTTP1.1
Sun, 21 Apr 2024 06:23:04 GMT