unicode-org/icu
The home of the ICU project source code.
In plain words
Outside PRs: 8 in 10 merged. First reply usually within 20 h.
Outside PRs merged
84%
74 merged, 14 closed, 11 still open
Higher than 53% of 565 other measured repositories
First human reply
20 h
median of 99 outside PRs, 11 unanswered
Time to merge
4 days
74 of 99 outside PRs merged
Outside PRs opened 30 to 120 days ago, so each has had time to be answered. A figure needs at least 5 pull requests, otherwise it reads "Not enough data". How this is calculated · A number looks wrong?
Your first steps here
If you have never contributed to this project, do these in order.
- 1
Read the contributing guide
It says how to set the project up and what the maintainers expect in a pull request.
Open the guide - 2
Find something small
No first issue is free right now. Look for a typo, a missing test or an unclear error message, or ask where help is wanted.
Browse open issues - 3
Know where to ask
No chat was found. Ask on the issue you are working on; that is where maintainers look.
- 4
Sign the contributor agreement
A bot will ask you to sign a contributor licence agreement on your first pull request. It takes a minute.
- 5
Open a small pull request
Link the issue in it. A first reply here usually takes 20 h; until then, silence is normal.
What happens to an outside pull request
Every pull request opened by someone outside the core team, 30 to 120 days ago.
- Opened by outsiders99100%
- Got a human reply8889%
- Merged7475%
Time to first reply
After 2 days, 59% of outside PRs had a reply from a person. After a week, 78%. Bots do not count.
The last 52 weeks
Steady. Median first reply was 11 h over the last four weeks (47 PRs) and 12 h over the four before (32 PRs).
Starter issues
Issues labelled for beginners, with their real state. Available means open, unassigned, no linked pull request, nobody has claimed it in the last 14 days, and it was updated in the last 60 days.
No open issue carries a beginner label.
Issue replies: first human reply in Not enough data (median of 0 issues).
When replies arrive
All maintainers counted together. Shown only when at least 3 people replied in the last 90 days, so it never describes one person.
Replies are most likely between 21:00 and 00:00 (India time).
Show as table
| Hour (India time) | Replies, all weekdays |
|---|---|
| 00:00 | 32 |
| 01:00 | 31 |
| 02:00 | 35 |
| 03:00 | 36 |
| 04:00 | 36 |
| 05:00 | 26 |
| 06:00 | 16 |
| 07:00 | 10 |
| 08:00 | 8 |
| 09:00 | 4 |
| 10:00 | 1 |
| 11:00 | 0 |
| 12:00 | 0 |
| 13:00 | 1 |
| 14:00 | 3 |
| 15:00 | 4 |
| 16:00 | 3 |
| 17:00 | 5 |
| 18:00 | 11 |
| 19:00 | 16 |
| 20:00 | 21 |
| 21:00 | 33 |
| 22:00 | 37 |
| 23:00 | 38 |
How to start
- Contributing guidefound
- Code of conductnot found
- Issue templatesnot found
- Dev container for one-step setupnot found
- A contributor licence agreement must be signed before a pull request is merged.
Where the project talks
No chat or mailing list link was found in the README or contributing guide.
Activity
- Commits, 90 days
- 180
- Releases, 12 months
- 6
- Active maintainers
- 11
- Last push
- 10 Oct 2026
Stack
Badge and feed
Two ways to use these figures outside this page.
For maintainers: a README badge
Shows newcomers how quickly this project answers and how often it merges. Paste the line into your README; the badge updates with the index.
[](https://contributable.vercel.app/repo/unicode-org/icu)[](https://contributable.vercel.app/repo/unicode-org/icu)For contributors: follow new issues
Add the feed to a feed reader (Feedly, Inoreader, Thunderbird) and you hear about new free starter issues here without checking the site.
https://contributable.vercel.app/feed/repo/unicode-org/icuFor developers: every figure on this page as JSON at /api/v1/repos/unicode-org/icu.
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