"Sat, 24 Jan 1970 19:40:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
19:40:39
General datetime
1970-01-24 19:40:39Z
For Database
1970-01-24 19:40:39
For HTTP1.1
Sat, 24 Jan 1970 19:40:39 GMT