R Core developer Martin Maechler working with Ella Kaye and Kelly Bodwin at an R Dev Day
R Dev Days are day-length events for new and experienced contributors to work collaboratively on contributions to base R. The R Dev Days page on the R Contributors site has more information on this series of events.
R Dev Day @ useR! 2026 is a free, hybrid event that will take place on July 10, the day after the conference concludes.
Tasks are prepared in the run-up to the event, but commonly include:
Tasks may also relate to contributor infrastructure, such as the R Dev Guide and the R Dev Container.
The main criteria for participation is a good knowledge of R programming and a keen interest in contributing, as we hope participants continue to contribute after the event.
We strongly encourage self-nominations from members of historically underrepresented groups in R development, including members of R-Ladies and rainbowR, and people from the Global South. Registration at useR! 2026 is not required to participate in R Dev Day.
R Dev Day is free to attend. We regret that support is not available for travel or accommodation.
Places at this R Dev Day are limited. Rather than open registration, participants will be selected from self-nominations, balancing across experience levels and giving opportunity to members of historically underrepresented groups.
To nominate yourself, please complete the nomination form by April 24. We aim to notify applicants of the outcome of their nomination by May 8.
We encourage people to self-nominate even if their attendance depends on other applications being successful (e.g. for a useR! presentation or visa).
R Dev Day will be held at the Warsaw University of Technology, where the useR! 2026 tutorials are being held. See the venue page for details of how to reach the campus. A small number of places will be reserved for remote participants, novice contributors should be available for the full day (09:00 to 17:00 CEST UTC+2).
The following is a rough schedule for the day, subject to change.
| Time | Activity |
|---|---|
| 09:00 | Arrival |
| 09:15 | Group kickoff and formation of task-focused small groups |
| 10:00 | Coffee break |
| 10:30 | Group work begins |
| 12:30 | Lunch break |
| 13:30 | Continued group work |
| 14:30 | Coffee break |
| 15:00 | Work continues |
| 17:00 | Group wrap-up |
This event is being organized by members of the R Contribution Working Group in coordination with the R Core Team.