Planning a bar or bat mitzvah, looking up a yahrzeit, or wondering which parashah falls on a Shabbat? Enter a date in either calendar. You get the other calendar, the portion read that Shabbat with a link to practice it, and anything else that falls on the day.
Enter a civil date or a Hebrew date and the page shows the other, the parashah read on that Shabbat with a link to practice it, any festival or special Shabbat that falls on the day, and when a Hebrew date next comes round.
Enter the date of the service. The page names the parashah read on that Shabbat and links to it, with the Hebrew text, the trope marks, and audio for every aliyah. Tap Keep on your home page to have it waiting for you with the weeks to go.
Festivals last one day in Israel and two outside it, so a Shabbat that is a festival day abroad is an ordinary Shabbat in Israel. From then until the cycles meet again, Israel is one parashah ahead. The page shows both when they differ; the Diaspora/Israel switch at the top sets which one you practice.
When a festival falls on Shabbat, its own reading replaces the weekly parashah. The page says so and links to the festival reading where the site has it — Rosh Hashanah, Yom Kippur, Sukkot, Sh'mini Atzeret and Simchat Torah.
In a Hebrew leap year the month picker offers Adar I and Adar II; in a common year, just Adar. For a yahrzeit set in Adar of a common year, the page shows the next occurrence in Adar I of a leap year, the common Ashkenazi practice; check with your rabbi if your community observes it in Adar II.
Yes. A Hebrew date starts the evening before the civil date shown here. The page gives the daytime, which is when a Torah reading happens, so a bar mitzvah on Saturday, March 13 shows the Hebrew date of that Shabbat morning.