"Tue, 27 Jan 1970 02:46:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
02:46:49
General datetime
1970-01-27 02:46:49Z
For Database
1970-01-27 02:46:49
For HTTP1.1
Tue, 27 Jan 1970 02:46:49 GMT