Years 3, 6, 8, 11, 14, 17 and 19 of the Metonic cycle are considered leap years. As a mnemonic rule of this sequence, some people use the Hebrew word GUCHADZaT (גוחאדז״ט), where the Hebrew letters gimel-vav-het aleph-dalet-zayin-tet are used as Hebrew numbers equivalent to 3, 6, 8, 1, 4, 7, 9.
The keviyah indicates whether a year is common or leap year. The letter פ is used for peshuta (פשוטה), which means ‘simple’ and denotes a common year, while the letter מ corresponds to me'uberet (מעוברת), meaning "emblematic", and denotes a leap year.