"Mon, 19 Aug 2024 15:40:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240819
Only TIME
15:40:04
General datetime
2024-08-19 15:40:04Z
For Database
2024-08-19 15:40:04
For HTTP1.1
Mon, 19 Aug 2024 15:40:04 GMT