Lunar Calendar Timing After Sunset
Not every calendar day begins at midnight. That sounds obvious until you try to build a planning app. A civil date can say Saturday, June 27, but a Hebrew calendar context may have shifted at sunset. A Hijri context can also depend on sunset, local convention, and whether a community follows observation or a fixed civil calculation. Sidera’s experimental Planner New includes two systems that force the app to respect this: Jewish / Halachic timing and Islamic lunar timing....