"Sun, 15 Dec 2024 17:20:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
17:20:11
General datetime
2024-12-15 17:20:11Z
For Database
2024-12-15 17:20:11
For HTTP1.1
Sun, 15 Dec 2024 17:20:11 GMT