"Mon, 16 Dec 2024 18:45:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241216
Only TIME
18:45:21
General datetime
2024-12-16 18:45:21Z
For Database
2024-12-16 18:45:21
For HTTP1.1
Mon, 16 Dec 2024 18:45:21 GMT