Tu BiShvat (Hebrew for the 15th day of the Hebrew month of Shvat) is the new year of the trees.
Tu BiShvat, called the "New Year of the Trees," falls at a seemingly incongruous time of year.
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).
In Israel, it is not unusual for guests to drop in for a visit without prior notice. In such cases, they are likely to get a light snack or impromptu meal.
This cold soup is particularly suitable for hot summer nights in Israel. Yogurt, the main ingredient, has been a popular food in Israel for many years.