Case study · in production
The 2net calendar
A live Hebrew-Gregorian calendar, driven by the zmanim engine we write.
2net runs a public calendar that visitors open to find a Hebrew date, a candle-lighting time, or when a festival falls. We built that calendar and we maintain it — including the times engine underneath it.
What the calendar carries
Hebrew and Gregorian in one cell
Every day carries both dates, the weekly Torah portion, and any festival that falls on it.
Times by place and by method
The visitor picks a town and the times are calculated for it. Calculation methods are named explicitly — never one number without saying whose.
Sabbath entry, Sabbath end, and the day's times
Candle-lighting, the end of the Sabbath, level and visible sunrise and sunset, and more — for every day of the year.
Yearly view and printing
Move between months and years in both directions, see a whole year at once, and print.
Why this is not trivial
A halachic time is not an astronomical calculation alone: it depends on the method, the location and the elevation, and it is disputed. In the last verification round we compared what our engine returns against the authoritative source site for each method, method by method, to the minute — and the differences that remained were rounding conventions only.
The same engine drives Hoshen and My Calendar, and is available on its own as the zmanim library.
A calendar like this
A content site that needs a reliable Hebrew calendar, or a product that needs times — both start with the same conversation.