View source for date command

to get a formatted date command, just append a + followed by format denotations

just give me the year!
 # '''date +%Y'''

year, month, day...
 # '''date +%Y-%m-%d'''                                                                                                        ~
 2013-08-01

just give me the time!
 # date +%H.%M.%S                                                                                                        ~
 23.00.20