How to add a Chinese lunar birthday to Outlook

Updated · 2026-05-23

Outlook can't repeat events on the lunar calendar — a yearly repeat stays on the same Gregorian date, while a Chinese lunar birthday moves 10–11 days each year. The fix is to subscribe to a calendar URL that already has the correct Gregorian date for each of the next 20 years. MoonCal generates that URL for you.

Outlook offers two similar-looking options, and choosing the wrong one is the most common mistake:

Option	What it does
Subscribe from web (URL)	Outlook keeps fetching the feed, so new and edited events stay in sync. This is what you want.
Upload / import an .ics file	A one-time copy. It never updates — if dates change or you add events later, Outlook will not know.

Always subscribe by URL for a lunar birthday calendar. If you import the .ics file once, the events are frozen and will not pick up future changes.

Step 1 — Create a MoonCal calendar and copy the URL

Create a calendar at usemooncal.com (free, no signup required to try).
Add your lunar birthday: set Date type to "Lunar", enter the lunar month and day, and tick "This is a leap month" only if it applies.
Optionally enter the birth year so the age shows in the title each year.
On the calendar detail page, click "Copy" next to the subscription URL.

Step 2 — Subscribe in Outlook on the web

Open Outlook on the web (outlook.com or outlook.office.com) and go to Calendar.
In the left sidebar, click "Add calendar".
Choose "Subscribe from web".
Paste the MoonCal subscription URL.
Give the calendar a name, pick a color, and click "Import" / "Save".

Step 2 (alt) — New Outlook for Windows / Mac

The new Outlook desktop apps share the web engine, so the steps match: Calendar → Add calendar → Subscribe from web → paste the URL. Calendars you add on the web also appear in the desktop app automatically once it syncs.

Classic (older) Outlook for Windows handles internet calendars differently and refreshes them slowly. If you can, add the subscription via Outlook on the web with the same Microsoft account — it will then show up across your Outlook apps.

How often Outlook refreshes

Like other calendar apps, Outlook fetches subscribed calendars on its own schedule rather than instantly. Expect new events and edits to appear within a day. There is no manual "refresh now" for subscribed calendars, so add the URL ahead of the birthday rather than the night before.

Common gotchas

Importing the .ics file instead of subscribing by URL — the events never update afterward.
Recording the lunar birthday as a Gregorian yearly repeat — it drifts 10–11 days a year.
Adding it in classic desktop Outlook and seeing slow or no refresh — add it via Outlook on the web instead.
Expecting an instant update after editing in MoonCal — give it up to a day.

Add a lunar birthday to Outlook now

Create a calendar, add one lunar birthday, and subscribe to the URL in Outlook on the web. MoonCal keeps the Gregorian dates correct for the next 20 years.

Get started — free

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Subscribe vs. import — pick the right one

Outlook offers two similar-looking options, and choosing the wrong one is the most common mistake:

Option	What it does
Subscribe from web (URL)	Outlook keeps fetching the feed, so new and edited events stay in sync. This is what you want.
Upload / import an .ics file	A one-time copy. It never updates — if dates change or you add events later, Outlook will not know.

Always subscribe by URL for a lunar birthday calendar. If you import the .ics file once, the events are frozen and will not pick up future changes.

Step 1 — Create a MoonCal calendar and copy the URL

Create a calendar at usemooncal.com (free, no signup required to try).

Add your lunar birthday: set Date type to "Lunar", enter the lunar month and day, and tick "This is a leap month" only if it applies.

Optionally enter the birth year so the age shows in the title each year.

On the calendar detail page, click "Copy" next to the subscription URL.

Step 2 (alt) — New Outlook for Windows / Mac

Common gotchas

Importing the .ics file instead of subscribing by URL — the events never update afterward.

Recording the lunar birthday as a Gregorian yearly repeat — it drifts 10–11 days a year.

Adding it in classic desktop Outlook and seeing slow or no refresh — add it via Outlook on the web instead.

Expecting an instant update after editing in MoonCal — give it up to a day.