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Hi Josh, thanks for using Hebcal and thanks for your question.
You can visit the Parashat Yitro page on Hebcal and next to the recent dates you'll find a search box that says "Look up the date of Parashat Yitro in a past or future year"

If you enter those 10 years (1918 through 1928) you should be able to get the dates (both Gregorian and Hebrew) pretty quickly.
Hi Ben, it can take up to 7 days for Google Calendar to refresh iCalendar subscription feeds.
For good measure, we just cleared our server-side cache to sometime within the next week when Google refreshes you should definitely see the updates.
Update: we've added a Yom Kippur Katan calendar feed to the Hebcal website. You can find it towards the bottom of the Jewish holiday downloads page.
Yom Kippur Katan
יוֹם כִּפּוּר קָטָן is a minor day of atonement occurring monthly on the day preceeding each Rosh Chodesh.
9 calendar events per year. 10-year perpetual feed.
Yom Kippur Katan is omitted in Elul (on the day before Rosh Hashanah), Tishrei (Yom Kippur has just passed), Kislev (due to Chanukah) or Nisan (fasting not permitted during Nisan). When Rosh Chodesh occurs on Shabbat or Sunday, Yom Kippur Katan is observed on the preceding Thursday. [1]
Outlook CSV
iCalendar link:
Hi, thanks for using Hebcal and thanks for the feedback!
Hebcal.com now offers a REST API for calculating zmanim (halachic times) for a given location
https://www.hebcal.com/home/1663/zmanim-halachic-times-api
chatzotNight – Midnight – Chatzot
Sunset plus 6 halachic hours
alotHaShachar – Dawn – Alot haShachar
Sun is 16.1° below the horizon in the morning
misheyakir – Earliest talis & tefillin – Misheyakir
Sun is 11.5° below the horizon in the morning
misheyakirMachmir – Earliest talis & tefillin – Misheyakir Machmir
Sun is 10.2° below the horizon in the morning
dawn – Civil dawn
Sun is 6° below the horizon in the morning
sunrise – Sunrise
Upper edge of the Sun appears over the eastern horizon in the morning (0.833° above horizon)
sofZmanShma – Latest Shema (Gra)
Sunrise plus 3 halachic hours, according to the Gra
sofZmanTfilla – Latest Shacharit (Gra)
Sunrise plus 4.5 halachic hours, according to the Gra
chatzot – Midday – Chatzot
Sunrise plus 6 halachic hours
minchaGedola – Earliest Mincha – Mincha Gedola
Sunrise plus 6.5 halachic hours
minchaKetana – Preferable earliest time to recite Minchah – Mincha Ketana
Sunrise plus 9.5 halachic hours
plagHaMincha – Plag haMincha
Sunrise plus 10.75 halachic hours
sunset – Sunset
When the upper edge of the Sun disappears below the horizon (0.833° below horizon)
dusk – Civil dusk
Sun is 6° below the horizon in the evening
tzeit7083deg – Nightfall (3 medium stars) – Tzeit 7.083°
When 3 medium stars are observable in the night sky with the naked eye (sun 7.083° below the horizon)
tzeit85deg – Nightfall (3 small stars) – Tzeit 8.5°
When 3 small stars are observable in the night sky with the naked eye (sun 8.5° below the horizon)
tzeit42min – Nightfall (3 medium stars) – Tzeit 42 minutes
When 3 medium stars are observable in the night sky with the naked eye (fixed 42 minutes after sunset)
tzeit50min – Nightfall (3 small stars) – Tzeit 50 minutes
When 3 small stars are observable in the night sky with the naked eye (fixed 50 minutes after sunset)
tzeit72min – Nightfall (Rabbeinu Tam) – Tzeit 72 minutes
When 3 small stars are observable in the night sky with the naked eye (fixed 72 minutes after sunset)
Hi, thanks for using Hebcal.
We offer translations of event titles into Hebrew, Spanish, French, etc, but other fields such as memo/description are still available only in English.
Hi, thanks for using Hebcal, and thanks for the question.
Unfortunately no, we don't have a way to export just Minor or Modern holidays. Currently our calendar requires major holidays when you check one of the other options.
Hi, can you please let us know if this continues to be a problem? We have made some changes to how Outlook events are generated from Hebcal and we believe we have fixed the issue.
This issue was fixed several months ago. We reverted to 12-hour format for Brazil.
Customer support service by UserEcho
Hi, thanks for using Hebcal, and thanks for the feedback.
You might be referring to Mevarchim Chodesh, which is the blessing/welcoming of a new month, for example "Shabbat Mevarchim Chodesh Cheshvan"
https://www.hebcal.com/converter?hd=29&hm=Tishrei&hy=5781&h2g=1
A Shabbat Mevarchim Chodesh will always precede the Rosh Chodesh of that month.
We hope this clarifies things for you!