A moment is a medievalunit of time equal to 1.5 minutes or 1/40 of an hour. This reckoning is derived from the work of Bartholomeus Anglicus, writing in 1240 that each hour was divided into four points, each point into ten moments, each moment into twelve ounces, and each ounce into 47 atoms.
In modern English it usually refers to "a short period of time", the exact length remaining ambiguous.
In the Hebrew calendar, a moment (rega) is 1/76 of a part (chelek), or 5/114 of a second in standard units. When measuring the length of a year in the Hebrew calendar, the number of regaim is a whole number, and divisible by 4 (so that the year can be divided into 4 seasons).