1
Purim * - Jewish

St. David of Wales - Christian
2 - 20
Nineteen Day Fast * - Baha'i
3
Holi ** - Hindu
6
Meatfare Sunday - Orthodox Christian
17
St. Patrick's Day - Christian
18
New Year ** - Hindu
18-26
Ramayana ** - Hindu
19
St. Joseph's Day - Christian
21 Equinox
Norooz (New Year) - Persian/Zoroastrian
Naw-Rúz (New Year) * - Baha'i
Ostara - Mabon * - Wicca/Pagan Northern and Southern hemispheres
25
Annunciation of the Blessed Virgin Mary - Orthodox Christian
Palm Sunday - Christian
26
Ramanavami ** - Hindu
28
Khordad Sal (Birth of Prophet Zaranthushtra) ** - Zoroastrian
29
Maundy Thursday - Christian
30
Good Friday - Christian
31-April 7
Pesach * - Jewish
31
Lazarus Saturday - Orthodox Christian
Hanuman Jayanti ** - Hindu
Lord's Evening Meal - Jehovah's Witness Christian
Magha Puja Day ** - Buddhist

http://www.interfaith-calendar.org/2018.htm

https://www.calendarlabs.com/holidays/hindu/2018

https://www.thoughtco.com/pagan-wiccan-calendar-4110202
http://pagancalendar.co.uk/