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Outlook.com – delete Hebcal Jewish calendar

To remove a Hebcal Internet Calendar Subscription from Outlook.com on the Web (for @outlook.com, @hotmail.com, @live.com, and @msn.com email addresses)

This technique will also work with Windows 10 devices (desktops, laptops, tablets and phones) that have a built-in calendar application that connects to Outlook.com

Start by logging into your account at https://outlook.live.com/calendar/

On the left side of the page, under the heading “Other Calendars”, you can see your subscriptions.

Find the Hebcal calendar you wish to remove, click on the three dots (···) and then select “Remove” from the pop-up menu:

Havdalah now available on Candle-lighting Times Year at a Glance page

We are pleased to announce that Havdalah times can optionally be displayed on our Candle-lighting Times Year at a Glance page. This tool lets you get Shabbat and holiday candle lighting times and Parashat haShavuah (weekly Torah Portion) for the entire year on a single page. You can print it out and post it on your refrigerator.

The checkbox on the bottom of the page will show or hide the Havdalah times.

How to make changes to a Yahrzeit + Anniversary calendar

This article describes how to make changes to a Yahrzeit + Anniversary calendar that you downloaded, exported or subscribed to in a calendar app like Outlook, Google Calendar / Android, or Apple (iOS, iPhone, iPad or Mac).

If you used Hebcal to create your personal calendar after August 2020 and you subscribed using the recommended feed option, you can click on the hebcal.com URL at the bottom of a calendar event. That link will take you back to the Yahrzeit and Anniversary calendar where you can make edits to each person’s name or dates.

If you subscribed to annual email reminders and did not synchronize your Apple/Google/Outlook calendar, you will find an “Edit Yahrzeit” link at the bottom of the reminder email message.

example email message including edit link

If you subscribed before August 2020, you will need to delete or unsubscribe the calendar containing your yahrzeit and anniversary reminders. Hebcal personal event calendars created before this date do not support editing event dates or names. Directions for how to delete/remove a subscribed calendar vary by calendar application. 

You may have downloaded yahrzeit/anniversary events and merged them into your regular personal calendar (often called “Home” or “Calendar”). To remove those events, search for the event(s) in your regular calendar and remove/delete them one at a time. These events will always have one of the following titles: “Yahrzeit”, “Hebrew Birthday” or “Hebrew Anniversary”.

Once you have removed the yahrzeit/anniversary calendar events, return to Hebcal.com and re-enter in all of the event details, then download again.

Yahrzeit + Anniversary API

We are pleased to offer experimental support for a yahrzeit API.

Clients should POST x-www-form-urlencoded data to https://www.hebcal.com/yahrzeit

The following parameters must be specified

  • cfg=json
  • v=yahrzeit

The following parameters may be specified once

  • years=3 – default 20. Use years=1 for only a single Hebrew year
  • hebdate=on – append Hebrew date to the event titles (default off)
  • yizkor=on – Include Yizkor dates (Pesach 8th day, Shavuot 2nd day, Yom Kippur and Shmini Atzeret — default off)
  • start=5749 – beginning Hebrew year to calculate anniversary dates (defaults the current Hebrew year)
  • end=5761 – ending Hebrew year (inclusive) to calculate anniversary dates (defaults to start year + years years)

Then, specify at least one input date based on the Gregorian date of death (or birth). The following parameters are required, substituting the X with increasing integers beginning with 1.

  • yX=1983 – Gregorian year, 4-digit date
  • mX=4 – Gregorian month, 1 or 2 digits (1=January, 12=December)
  • dX=15 – Gregorian day of month (1-31)
  • sX=on – Event occurred on Gregorian date after sunset (default off implies that event occurred before sunset)
  • tX=Yahrzeit – type (either Yahrzeit, Birthday or Anniversary)
  • nX=Plonit%20ben%20Ploni – name (optional)

Here is an example of two events, a Hebrew Birthday for Example1 and a Yahrzeit for Example2:

curl \
  --compressed \
  -H 'content-type: application/x-www-form-urlencoded' \
  --data-raw \
'cfg=json&v=yahrzeit&n1=Example1&t1=Birthday&d1=15&m1=4&y1=1983&s1=on&n2=Example2&t2=Yahrzeit&d2=13&m2=11&y2=2008&s2=off&hebdate=on&years=3' \
  'https://www.hebcal.com/yahrzeit'

The response will be text/json that looks like this:

{
   "title": "Hebrew Anniversaries: Example1, Example2",
   "date": "2021-05-12T17:52:44.991Z",
   "items": [
     {
       "title": "Example2's 12th Yahrzeit (15th of Cheshvan)",
       "date": "2020-11-02",
       "memo": "Hebcal joins you in remembering Example2, whose 12th Yahrzeit occurs on Monday, November 2, corresponding to the 15th of Cheshvan, 5781.\n\nExample2's Yahrzeit begins at sundown on Sunday, November 1 and continues until sundown on the day of observance. It is customary to light a memorial candle at sundown as the Yahrzeit begins.\n\nMay your loved one's soul be bound up in the bond of eternal life and may their memory serve as a continued source of inspiration and comfort to you."
     },
     {
       "title": "Example1's 38th Hebrew Birthday (3rd of Iyyar)",
       "date": "2021-04-15",
       "memo": "Hebcal joins you in honoring Example1, whose 38th Hebrew Birthday occurs on Thursday, April 15, corresponding to the 3rd of Iyyar, 5781.\n\nExample1's Hebrew Birthday begins at sundown on Wednesday, April 14 and continues until sundown on the day of observance."
     },
     {
       "title": "Example2's 13th Yahrzeit (15th of Cheshvan)",
       "date": "2021-10-21",
       "memo": "Hebcal joins you in remembering Example2, whose 13th Yahrzeit occurs on Thursday, October 21, corresponding to the 15th of Cheshvan, 5782.\n\nExample2's Yahrzeit begins at sundown on Wednesday, October 20 and continues until sundown on the day of observance. It is customary to light a memorial candle at sundown as the Yahrzeit begins.\n\nMay your loved one's soul be bound up in the bond of eternal life and may their memory serve as a continued source of inspiration and comfort to you."
     },
     {
       "title": "Example1's 39th Hebrew Birthday (3rd of Iyyar)",
       "date": "2022-05-04",
       "memo": "Hebcal joins you in honoring Example1, whose 39th Hebrew Birthday occurs on Wednesday, May 4, corresponding to the 3rd of Iyyar, 5782.\n\nExample1's Hebrew Birthday begins at sundown on Tuesday, May 3 and continues until sundown on the day of observance."
     },
     {
       "title": "Example2's 14th Yahrzeit (15th of Cheshvan)",
       "date": "2022-11-09",
       "memo": "Hebcal joins you in remembering Example2, whose 14th Yahrzeit occurs on Wednesday, November 9, corresponding to the 15th of Cheshvan, 5783.\n\nExample2's Yahrzeit begins at sundown on Tuesday, November 8 and continues until sundown on the day of observance. It is customary to light a memorial candle at sundown as the Yahrzeit begins.\n\nMay your loved one's soul be bound up in the bond of eternal life and may their memory serve as a continued source of inspiration and comfort to you."
     },
     {
       "title": "Example1's 40th Hebrew Birthday (3rd of Iyyar)",
       "date": "2023-04-24",
       "memo": "Hebcal joins you in honoring Example1, whose 40th Hebrew Birthday occurs on Monday, April 24, corresponding to the 3rd of Iyyar, 5783.\n\nExample1's Hebrew Birthday begins at sundown on Sunday, April 23 and continues until sundown on the day of observance."
     }
   ]
 } 

Zmanim (halachic times) API

Hebcal.com now offers a REST API for calculating zmanim (halachic times) for a given location. The basic URL format is as follows:

https://www.hebcal.com/zmanim?cfg=json&geonameid=3448439&date=2021-03-23

Note the following required parameter and its meaning:

  • cfg=json – output JSON

Location must be specified by one of the following mutually exclusive parameters:

  • GeoNames.org numeric ID
    • requires additional parameter geonameid=3448439
    • Hebcal.com supports approximately 47,000 different GeoNames IDs. These are cities with a population of 5000+. See cities5000.zip from https://download.geonames.org/export/dump/.
  • United States ZIP code
    • requires additional parameter zip=90210
  • One of 400 legacy Hebcal city identifiers
    • requires additional parameter city=GB-London
  • Geographic position: location specified by latitude, longitude, and timezone. Requires additional 3 parameters:
    • latitude=[-90.0 to 90.0] – latitude in decimal format (e.g. 31.76904 or -23.5475)
    • longitude=[-180.0 to 180.0] – longitude decimal format (e.g. 35.21633 or -46.63611)
    • tzid=TimezoneIdentifier. See List of tz database time zones. Be sure to use the “TZ database name” such as America/New_York or Europe/Paris, not a UTC offset

Note the following optional date parameters and their meanings:

  • date=2021-03-23 – calculate zmanim for a single date using YYYY-MM-DD format (defaults to today if not specified)
  • start=2021-01-15&end=2021-01-22 – calculate zmanim for a date range using YYYY-MM-DD format. Results will be truncated to 180 days if the end date is more than 180 days after the start date 

The following Zmanim are included in the response:

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)