Hanuman Jayanti is celebrated on the full moon day (pournima) of the
Hindu lunar month of Chaitra. A special feature of Hanuman Jayanti is
that according to some religious almanacs (panchangs) the birthday of
Shri Hanuman falls on the fourteenth day (chaturdashi) in the dark
fortnight of the month of Ashvin while according to others it falls on
the full moon day in the bright fortnight of Chaitra. This year it falls
on 14th April 2014.