Date Formats for NSDateFormatter

NSDateFormatter cheat sheet

 a:  AM/PM
 A:	0~86399999 (Millisecond of Day)
 
 c/cc:	1~7 (Day of Week)
 ccc:	Sun/Mon/Tue/Wed/Thu/Fri/Sat
 cccc:	Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
 
 d:	1~31 (0 padded Day of Month)
 D:	1~366 (0 padded Day of Year) 
 
 e:	1~7 (0 padded Day of Week)
 E~EEE:	Sun/Mon/Tue/Wed/Thu/Fri/Sat
 EEEE:	Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
 
 F:	1~5 (0 padded Week of Month, first day of week = Monday)
 
 g:	Julian Day Number (number of days since 4713 BC January 1)
 G~GGG:	BC/AD (Era Designator Abbreviated)
 GGGG:	Before Christ/Anno Domini
 
 h:	1~12 (0 padded Hour (12hr))
 H:	0~23 (0 padded Hour (24hr))
 
 k:	1~24 (0 padded Hour (24hr)
 K:	0~11 (0 padded Hour (12hr))
 
 L/LL:	1~12 (0 padded Month)
 LLL:	Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
 LLLL:	January/February/March/April/May/June/July/August/September/October/November/December
 
 m:	0~59 (0 padded Minute)
 M/MM:	1~12 (0 padded Month)
 MMM:	Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
 MMMM:	January/February/March/April/May/June/July/August/September/October/November/December
 
 q/qq:	1~4 (0 padded Quarter)
 qqq:	Q1/Q2/Q3/Q4
 qqqq:	1st quarter/2nd quarter/3rd quarter/4th quarter
 Q/QQ:	1~4 (0 padded Quarter)
 QQQ:	Q1/Q2/Q3/Q4
 QQQQ:	1st quarter/2nd quarter/3rd quarter/4th quarter
 
 s:	0~59 (0 padded Second)
 S:	(rounded Sub-Second)
 
 u:	(0 padded Year)
 
 v~vvv:	(General GMT Timezone Abbreviation)
 vvvv:	(General GMT Timezone Name)
 
 w:	1~53 (0 padded Week of Year, 1st day of week = Sunday, NB: 1st week of year starts from the last Sunday of last year)
 W:	1~5 (0 padded Week of Month, 1st day of week = Sunday)
 
 y/yyyy:	(Full Year)
 yy/yyy:	(2 Digits Year)
 Y/YYYY:	(Full Year, starting from the Sunday of the 1st week of year)
 YY/YYY:	(2 Digits Year, starting from the Sunday of the 1st week of year)
 
 z~zzz:	(Specific GMT Timezone Abbreviation)
 zzzz:	(Specific GMT Timezone Name)
 Z:	+0000 (RFC 822 Timezone)