Update events page with C Study Group 2025

Author: EllaKaye

events/index.md

@@ -8,9 +8,11 @@ Meetings and events for existing/aspiring R contributors.
 
 ## Current events
 
-* R Dev Days/Sprints: Collaborative events to work on contributions to R or infrastructure that supports such contribution. Upcoming event(s) [@ SIP](https://pretix.eu/r-contributors/r-dev-day-sip-2024/) (Newcastle, UK, October 8-9). [Google Calendar](https://calendar.google.com/calendar/embed?src=096ece8c4dd2994219c1e504a6d474f7964e16fe18eced1dbdb8d5323ee6297b%40group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/096ece8c4dd2994219c1e504a6d474f7964e16fe18eced1dbdb8d5323ee6297b%40group.calendar.google.com/public/basic.ics).  
+* R Dev Days/Sprints: Collaborative events to work on contributions to R or infrastructure that supports such contribution. 
+<!-- Upcoming event(s) [@ SIP](https://pretix.eu/r-contributors/r-dev-day-sip-2024/) (Newcastle, UK, October 8-9). [Google Calendar](https://calendar.google.com/calendar/embed?src=096ece8c4dd2994219c1e504a6d474f7964e16fe18eced1dbdb8d5323ee6297b%40group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/096ece8c4dd2994219c1e504a6d474f7964e16fe18eced1dbdb8d5323ee6297b%40group.calendar.google.com/public/basic.ics).  --->
 * [R Contributor Office Hours](office-hours): monthly drop-in sessions to help people get started with contributing to R. Discuss work in progress or work together on open bugs/missing translations. [Google Calendar](https://calendar.google.com/calendar/u/0/r?cid=c7b298f30426b575f888ee963ec38a6da1ad6d2dbc27f34d501a72f2d8abb1cf@group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/c7b298f30426b575f888ee963ec38a6da1ad6d2dbc27f34d501a72f2d8abb1cf%40group.calendar.google.com/public/basic.ics).  
-* [C Study Group](c-study-group-2024): study group designed for R contributors to develop skills in C programming. [Google Calendar](https://calendar.google.com/calendar/u/1?cid=ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc@group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc%40group.calendar.google.com/public/basic.ics).
+* [C Study Group](c-study-group-2025) (upcoming - January-June 2025): study group designed for R contributors to develop skills in C programming. Calendar links will be shared when timings are finalised. Please fill in [this whenisgood poll](https://whenisgood.net/jqfrg3j) if you're interested in participating.
+<!-- [Google Calendar](https://calendar.google.com/calendar/u/1?cid=ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc@group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc%40group.calendar.google.com/public/basic.ics).-->
 * [R Contribution Working Group](/working-group): meetings to organize events and work on other infrastructure supporting contributors. [Google Calendar](https://calendar.google.com/calendar/u/0/[email protected]) / [iCal](https://calendar.google.com/calendar/ical/nc4tg39nam44itn9uhnf751hbk%40group.calendar.google.com/public/basic.ics). 
 
 Note: iCalendar (iCal/.ics) format is supported by most calendar software, including Outlook, Thunderbird.
@@ -24,9 +26,11 @@ Note: you can set the calendar below to show your time zone by clicking the time
 <iframe src="https://teamup.com/kskqth1ysymh61tiyv?view=a&showProfileAndInfo=0&showSidepanel=1&showAgendaDateRange=year&showAgendaHeader=1&showAgendaDetails=0&showYearViewHeader=1" style="width: 100%; height: 500px; border: 1px solid #cccccc" loading="lazy" frameborder="0"></iframe>
 
 <br>
+
 ## Past events
 
-* [C Book Club](c-book-club-2023): book club designed for R contributors to develop skills in C programming.
+* [C Study Group 2024](c-study-group-2024): study group designed for R contributors to develop skills in C programming.
+* [C Book Club 2023](c-book-club-2023): book club designed for R contributors to develop skills in C programming.
 <!-- [Google Calendar](https://calendar.google.com/calendar/u/1?cid=ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc@group.calendar.google.com) / [iCal](https://calendar.google.com/calendar/ical/ab59b5988cef70d576d045f33a7b4ec633d665afb070aaf696b4b353254c74dc%40group.calendar.google.com/public/basic.ics) -->
 * [Collaboration Campfires](collaboration-campfires): sessions for newcomers to learn more about contributing to R and to work collaboratively on activities to build knowledge and skills in this area. 
 <!-- [Google Calendar](https://calendar.google.com/calendar/u/0/[email protected]) / [iCal](https://calendar.google.com/calendar/ical/4gvpmaj0coinh0kuvc9lbissbo%40group.calendar.google.com/public/basic.ics) -->