Blessed be! Today marks the first day of spring in the Northern Hemisphere; spring traditionally begins with the vernal equinox. Many witches and neo-Pagans also celebrate Ostara on the first day of spring. It's a joyous holiday to welcome the nicer weather, flowers, and rebirth after winter's harshness. You don't need a fancy home altar to celebrate Ostara — just gather these supplies and get in the magical mood.
Now, for your ritual chant.
There's a ton of Ostara ritual chants you can find all over the internet, but I love this one from The Grimoire of Lady Sheba ($13.50, Amazon), a spell book that was first published in 1972. Lady Sheba's rituals are full of flair and drama, which is why I like them. I took photos of her Ostara ritual chant, pictured above, though I did crop out some parts that were probably fine in 1972, but are totally problematic today.
You don't even need to say the whole thing — Ostara is meant to be a very lighthearted, happy occasion, so give blessings in whatever words feel right to you.