The Inquisition was created in the twelfth century to find "Christian heretics" who would be punished or killed. Eventually, Jews too were open to such charges of heresy, simply for being Jewish; and torture was routinely used to extract "confessions." Over the years, the inquisition, which operated with Papal consent, spread to many countries.
In 1481 the Inquisition began to function in Spain to expose the secret Jews, known as the Anusim or Marranos. This Inquisition was anti-Jewish more than in any previous countries. The first public sentencing and burning alive of six marrano men and one woman by the Spanish Inquisition was held on this date in Seville in Southern Spain.
The Chevrah Kadisha (Jewish Burial Societies) hold their annual get-together and feast on Adar 7th. This is based on the tradition that G-d Himself buried Moses on this day -- granting them a respite from their labors.
Once a month, as the moon waxes in the sky, we recite a special blessing called Kiddush Levanah, "the sanctification of the moon," praising the Creator for His wondrous work we call astronomy.
Kiddush Levanah is recited after nightfall, usually on Saturday night. The blessing is concluded with songs and dancing, because our nation is likened to the moon—as it waxes and wanes, so have we throughout history. When we bless the moon, we renew our trust that very soon, the light of G‑d's presence will fill all the earth and our people will be redeemed from exile.
Though Kiddush Levanah can be recited as early as three days after the moon's rebirth, the kabbalah tells us it is best to wait a full week, till the seventh of the month. Once 15 days have passed, the moon begins to wane once more and the season for saying the blessing has passed.