1
Beltane - Samhain * - Wicca/Pagan northern and southern hemispheres (begins sundown on April 30)
2
Twelfth Day of Ridvan * - Baha'i (begins sundown on 1)
4
Visakha Puja - Buddha Day ** - Buddhist
7
Lag B'Omer * - Jewish
National Day of Prayer USA - Interfaith


13
Lailat al Miraj * - Islam (begins sundown on 12)

May 14 - Ascension of Jesus , Christian
May 21 - Ascension of Jesus , Orthodox Christian

21
Declaration of the Bab * - Baha'i (begins sundown on 20)
24-25
Shavuot * - Jewish ( begins sundown on 23)
24
Pentecost - Christian
29
Ascension of Baha'u'llah * - Baha'i ( begins sundown on 28)
31
Pentecost - Orthodox Christian
Trinity Sunday - Christian
http://www.interfaithcalendar.org/2015.htm
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