Hebcal is the most widely used free option and exposes candle lighting, havdalah, parashah, and full Hebrew date data for any coordinate pair. It supports configurable candle-lighting offsets and havdalah methods (Tzeit hakochavim 50min, R Tukatzinsky, 72min, custom degree-based). Other sites use ChabadCalendar exports or precomputed CSVs.

Each city row carries its candle-lighting offset (18, 22, 30, or 40 minutes before sunset) and havdalah method (Tzeit hakochavim, R Tukatzinsky, 72 minutes). The page renders both in the body so users can see whether they are looking at Brooklyn's 18-minute custom or Jerusalem's 40-minute custom without having to guess.

Yes. Tzeit hakochavim at 50 minutes after sunset is the most common, but Tukatzinsky, 72 minutes, and 8.5-degree solar depression are all in use across different communities. Store the chosen method per row and pass it to the source so each page renders the method its audience follows.

The Hebrew calendar feed returns the parashah name for the upcoming Shabbat and flags holiday weeks like Shabbat Shuva, Shabbat Hagadol, and Shabbat Chazon. The page renders the parashah name in the body and uses a separate selector for any special-Shabbat designation, so the URL stays useful across the whole year.

Set cacheDuration to 604800 (one week) with a daily revalidation. The page renders this week's times until Saturday night, then rolls forward to next Friday's candle lighting at havdalah. The four-Shabbatot table always shows the upcoming four windows, so the page never feels stale.

Jerusalem traditionally uses a 40-minute candle-lighting offset to avoid encroaching on Shabbat. Tel Aviv and other Israeli cities use 30 minutes. Store the city-appropriate offset per row, and the source uses it directly. The page renders the offset explicitly so users see, for example, '40 minutes before sunset' alongside the candle-lighting time.

Yes. SleekRank registers every generated URL with the sitemap and noindexes the base template page so only city URLs get crawled. New cities added to the feed appear in the sitemap on the next refresh, which matters when expanding into new diaspora audiences.

Yes. Either expand the row to include eruv status and a nearby-shul list, or run separate page groups at /eruv/{slug}/ and /shuls/{slug}/ sharing the city slug. Internal links between Shabbat times, eruv status, and shul listings compound topical relevance for the city and help all three pages rank for related queries.