The appropriate greeting for Easter is 'Happy Easter'. If one were to say Happy Birthday Jesus, at Christmas, they could say Christ is Risen at Easter.
Christmas
hi how are you? happy Good Friday
A seasonal greeting is a greeting apropos to the season, e.g., Merry Christmas, Happy Easter, Happy Independence Day, etc.
Not Jesus' Birthday: Jesus' resurrection is celebrated on Easter. His birthday is celebrated on Christmas Day.
"Auguri" can be used to congratulate someone on their birthday as an alternative to the more literal "buon compleanno". Auguri can also be used for other festivities as a greeting to friends and family, such as Christmas, Easter etc.
get it for your birthday, Christmas or Easter
Halloween Easter Christmas Birthday Valentine's Day
Halloween Easter Birthday Christmas Valentines
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White is worn as a sign of joy. Easter and Christmas are the most joyous of holy days: Jesus resurrection and birth.
When is the Easter Bunny's birthday.
The most significant feast day is Pentecost as it is the birthday of the Church. It is followed by Easter and Christmas.