"Sat, 21 Dec 2024 18:19:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
18:19:15
General datetime
2024-12-21 18:19:15Z
For Database
2024-12-21 18:19:15
For HTTP1.1
Sat, 21 Dec 2024 18:19:15 GMT