"Mon, 19 Aug 2024 18:21:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240819
Only TIME
18:21:21
General datetime
2024-08-19 18:21:21Z
For Database
2024-08-19 18:21:21
For HTTP1.1
Mon, 19 Aug 2024 18:21:21 GMT