From ancient biblical times, the Torah has been divided into portions which are read each week on a yearly calendar. In line with this tradition, various calendars have emerged to facilitate groups of learners in collectively studying designated texts.
Tanakh Yomi is a daily learning cycle for completing Tanakh annually. On weekdays, 293 chapters of Prophets (Nevi’im) and Writings (Ketuvim) are recited according to the ancient Masoretic division of sedarim. On Shabbat, each Torah portion is recited.
In addition to Shabbat, the Tanakh Yomi calendar also skips major holidays (Pesach days 1 and 7, Shavuot, Rosh Hashana , Yom Kippur, Sukkot day 1, Shmini Atzeret), Purim, Yom HaAtzma’ut, and Tish’a B’Av.
The Tanakh Yomi cycle completes each year and restarts the day after Shmini Atzeret. The cycle follows the Israeli schedule in the sense that it does not make any special accommodations for yom tov sheini. The Hebcal implementation was created after careful study of the schedule posted at דף הבית | תנ״ך יומי website.