Codeforces Calendar

by Chazz Yu · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 20 Oct 2026

Sync upcoming Codeforces contests to Google Calendar.

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#217K

#182K among extensions

Version

1.1.0

updated 8 Apr 2026

Users

monthly, 6 months

Latest, 20 Oct 2026: 8 usersMove the mouse over the chart for any month

Ratings count

monthly, 6 months

Latest, 20 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Codeforces Calendar

Chrome extension that syncs upcoming Codeforces contests into Google Calendar. It injects `Sync` buttons into the Codeforces upcoming contests table. Clicking `Sync` creates or updates a Google Calendar event for that contest. ## How to use 1. Click the extension icon and follow the instructions in the popup. 2. Open the Codeforces contests page and click `Sync` on an upcoming contest row. 3. You can click `Sync` again later to update the same event. ## Permissions - Uses Google sign-in and Calendar access to create/update events. - Reads Codeforces upcoming contest pages and Codeforces API to get contest data.