"Sun, 18 Jan 1970 11:26:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700118
Only TIME
11:26:05
General datetime
1970-01-18 11:26:05Z
For Database
1970-01-18 11:26:05
For HTTP1.1
Sun, 18 Jan 1970 11:26:05 GMT