[092] roman numerals XXII. XI. MMXII

Roman numerals	Value
I	1
II	2
III	3
IV	4
V	5
VI	6
VII	7
VIII	8
IX	9
X	10
XI	11
XII	12
XIII	13
XIV	14
XV	15
XVI	16
XVII	17
XVIII	18
XIX	19
XX	20
XXX	30
XL	40
L	50
LX	60
LXX	70
LXXX	80
XC	90
XCIX	99
C	100
CI	101
CII	102
CXCIX	199
CC	200
CCC	300
CD	400
D	500
DCCC	800
CM	900
M	1,000
MCD	1,400
MCDXXXVII	1,437
MD	1,500
MDCCC	1,800
MDCCCLXXX	1,880
MCM	1,900
MM	2,000
MMI	2,001
MMC	2,100
MMCC	2,200
MMCM	2,900
MMM	3,000
MMMCCCXXXIII	3,333
MMMDCCCLXXXVIII	3,888

Reference: Wikipedia → roman numerals

Therefore, XXII. XI. MMXII is 2012.11.22.