Host a contest

This platform can run your programming contest: your problems, your contestants, your own organiser account. Pick a slot the calendar shows as free, tell us who you are, and we will write back to confirm.

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July 2025

Times are in UTC. Bars show how much of each day is booked; open a day to see which hours are taken and which are free.

Contest windows in July 2025, all times UTC.
Mon	Tue	Wed	Thu	Fri	Sat	Sun
30 30 June · UTC Nothing booked — free all day	1 1 July · UTC Nothing booked — free all day	2 2 July · UTC Nothing booked — free all day	3 3 July · UTC Nothing booked — free all day	4 4 July · UTC Nothing booked — free all day	5 5 July · UTC Nothing booked — free all day	6 6 July · UTC Nothing booked — free all day
7 7 July · UTC Nothing booked — free all day	8 8 July · UTC Nothing booked — free all day	9 9 July · UTC Nothing booked — free all day	10 10 July · UTC Nothing booked — free all day	11 11 July · UTC Nothing booked — free all day	12 12 July · UTC Nothing booked — free all day	13 13 July · UTC Nothing booked — free all day
14 14 July · UTC Nothing booked — free all day	15 15 July · UTC Nothing booked — free all day	16 16 July · UTC Nothing booked — free all day	17 17 July · UTC Nothing booked — free all day	18 18 July · UTC Nothing booked — free all day	19 19 July · UTC Nothing booked — free all day	20 20 July · UTC Nothing booked — free all day
21 21 July · UTC Nothing booked — free all day	22 22 July · UTC Nothing booked — free all day	23 23 July · UTC Nothing booked — free all day	24 24 July · UTC Nothing booked — free all day	25 25 July · UTC Nothing booked — free all day	26 26 July · UTC Nothing booked — free all day	27 27 July · UTC Nothing booked — free all day
28 28 July · UTC Nothing booked — free all day	29 29 July · UTC Nothing booked — free all day	30 30 July · UTC Nothing booked — free all day	31 31 July · UTC Nothing booked — free all day	1 1 August · UTC Nothing booked — free all day	2 2 August · UTC Nothing booked — free all day	3 3 August · UTC Nothing booked — free all day

Named windows are confirmed. requested means someone has asked for that day and we have not decided yet — you may still ask for it.

Ask for a slot

Your name

School or organisation

Phone (optional)

Contest name

Start

End

Time zone

Expected participants (optional)

The start and end are on the clock of the time zone you pick. A contest may run for at most 12 hours, and must start at least 24 hours from now.

Anything else (optional)

I agree that my name, organisation, email and phone number are stored so that this contest can be arranged, and that they are used for nothing else. They are visible only to the people running this platform, are never published, and can be deleted on request. The address this request is sent from is also recorded, to spot abuse of this form.

Nothing is booked until we confirm it. You will get a link to check the status of your request; keep it, because it is the only way back to it.