I am familiar with a Passover seder, but what is a Tu BiShvat seder?
Tu BiShvat (Hebrew for the 15th day of the Hebrew month of Shvat) is the new year of the trees.
Why do we celebrate Tu BiShvat, the Jewish “New Year of the Trees,” in the middle of winter?
Tu BiShvat, called the "New Year of the Trees," falls at a seemingly incongruous time of year.
Why is caring for the environment emphasized on Tu BiShvat?
Tu BiShvat is a minor festival whose provenance dates only to the time of the Second Temple. However, the kabbalists who clustered around the great fifteenth-century mystic Isaac Luria of Safed placed great weight on the holiday, creating new festivities, gatherings at which hymns were sung, fruit (particularly carob) was eaten, and four cups of wine were taken (as in the Passover seder).
Baal t’kiah
Literally, “master of t’kiah,” meaning “one who sounds the shofar.”
Cheit
A Hebrew term for “sin.” Cheit is a Hebrew archery term meaning “missing the mark.” A section of High Holiday liturgy is the Al Cheit, a confession of ways in which we “missed the mark” during the past year.
L’shanah tovah
Literally, “for a good year.” This is a customary greeting for Rosh HaShanah. Also, “shanah tovah.”
T’kiah
Literally, “blast” or “blowing of a horn;” it is a note of the shofar call.
T’kiah g’dolah
Literally the “great” t’kiah, this is the longest, deepest call of the shofar heard as the final shofar blast on Rosh HaShanah and Yom Kippur.
T’ruah
Literally, “shout;” one of the shofar blasts. It is composed of a series of nine short blasts.
Yamim Noraim
"Days of Awe." An alternate name for the High Holidays, and the 10-day period beginning with Rosh HaShanah and concluding with Yom Kippur.