Format can be any date or time pattern. Supported symbols:
y|YYear
MMonth
wWeek in year
WWeek in month
DDay in year
dDay in month
FDay of week in month
EDay name in week
uDay number of week (1 = Monday, ..., 7 = Sunday)
HHour in day (0-23)
kHour in day (1-24)
KHour in am/pm (0-11)
hHour in am/pm (1-12)

Examples