Char	Description	Min	Cur	Max
Y	A four digit representation of a year	1902	2021	2038
y	A two digit representation of a year	00	21	99
o	ISO-8601 year number. This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead.	1902	2021	2038
L	Whether it's a leap year	0	0	1