Lubridate

code
Conversion specification Description Example
%a Abbreviated weekday Sun, Thu
%A Full weekday Sunday, Thursday
%b or %h Abbreviated month May, Jul
%B Full month May, July
%d Day of the month
01-31		 27, 07
%j Day of the year
001-366		 148, 188
%m Month
01-12		 05, 07
%U Week
01-53
with Sunday as first day of the week		 22, 27
%w Weekday
0-6
Sunday is 0		 0, 4
%W Week
00-53
with Monday as first day of the week		 21, 27
%x Date, locale-specific
%y Year without century
00-99		 84, 05
%Y Year with century
on input:
00 to 68 prefixed by 20
69 to 99 prefixed by 19		 1984, 2005
%C Century 19, 20
%D Date formatted %m/%d/%y 05/27/84, 07/07/05
%u Weekday
1-7
Monday is 1		 7, 4
%n Newline on output or
Arbitrary whitespace on input
%t Tab on output or
Arbitrary whitespace on input