1
Triodion begins Orthodox Christian
Four Chaplains Sunday- Interfaith
2
Candlemas - Christian
Presentation of Christ in the Temple - Anglican Christian
St Brighid of Kildare - Celtic Christian
Imbolc - Lughnassad * - Wicca/Pagan - northern and southern hemispheres (begins at sundown on 1 )
3
Setsubun-sai ** - Shinto
4
Tu BiShvat * - Jewish (begins sundown on 3 )
14
Saint Valentine's Day- Christian
15
Nirvana Day ** - Buddhist - Jain
Transfiguration Sunday - Christian
Meatfare Sunday - Orthodox Christian
17
Shrove Tuesday - Christian
18
Ash Wednesday - Christian
19
World Religion Day - Baha'i
Chinese New Year - Confucian, Daoist, Buddhist
22
Cheesefare Sunday - Orthodox Christian
23
Clean Monday - Great Lent begins - Orthodox Christian
26 - March 1
Intercalary Days * - Baha'i (begins sundown on 25)

http://www.interfaithcalendar.org/2015.htm