Day of Week

<<March2/2020>>
First(1st)Monday
bYear<<bMonth<Today>aMonth>>aYear
YYYY
MM
DD

NOW:
[TRIVIA]Name of the days of the week is called YOUBI(曜日) in Japanese.Is this name short and good?
REFERENCE
TARGET:1600-2100 of the Gregorian calendar
Day of Week in Month calculator
Since2013