April

April features Earth Day, Passover and Easter.

DateNational Day
01-Apr Maundy Thursday - Christian
02-Apr Good Friday - Bank holiday
02-Apr Rama Navami - Hindu
02-Apr World Autism Awareness Day
03-Apr Holy Saturday - Christian
04-Apr Last day of Passover - Jewish holiday
04-Apr Easter Sunday - Christian 
05-Apr Easter Monday - Bank holiday
06-Apr Mahavir Jayanti - Jain
07-Apr World Health Day
08-Apr International Romani Day
08-Apr Hanuman Jayanti - Hindu
08-Apr Lailat al Miraj - Islam
08-Apr Pesach (Passover) - Jewish - Begins at sundown
08-Apr Yom HaShoah - Jewish commemoration
11-Apr Holy Saturday - Christian
11-Apr Lazarus Saturday - Orthodox Christian
13-Apr Birth of the Khalsa (Vaisakhi) - Sikh
13-Apr Ramadan starts - Muslim
15-Apr Yom HaAtzmaut - Jewish holiday
18-Apr Birthday of Guru Tegh Bahadur - Sikh
18-Apr Birthday of Guru Angad Dev - Sikh
19-Apr Pascha (Easter) - Orthodox Christian
20-Apr First day of Ridvan - Baha'i
22-Apr Stephen Lawrence Day
22-Apr Earth Day
23-Apr St George's Day - Christian
25-Apr World Malaria Day
26-Apr Akshaya Tritya - Hindu, Jain
28-Apr Ninth Day of Ridvan - Baha'i
28-Apr Yom HaZikaron (Israeli Memorial Day) - Jewish
28-Apr World Day for Health and Safety at Work
30-Apr Lag B'Omer - Jewish holiday
30-Apr Saint James the Great's Day - Orthodox Christian
30-Apr Orthodox Good Friday
30-Apr Beltane-Samhain - Wicca/Pagan Northern and Southern Hemisphere - Sunset to sunset (30 Apr - 1 May)