"Sun, 25 Jan 1970 12:31:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700125
Only TIME
12:31:34
General datetime
1970-01-25 12:31:34Z
For Database
1970-01-25 12:31:34
For HTTP1.1
Sun, 25 Jan 1970 12:31:34 GMT