"Sun, 15 Dec 2024 18:42:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
18:42:19
General datetime
2024-12-15 18:42:19Z
For Database
2024-12-15 18:42:19
For HTTP1.1
Sun, 15 Dec 2024 18:42:19 GMT