Publish partial schedules

[stefanor]

DebConf17 found itself wanting to publish the Open Day schedule (the most public part of the conference) before the main schedule was ready. So, they ended up writing an HTML table in a page :/
https://debconf17.debconf.org/schedule/open-day/

Not sure what the best solution to this is. Public/Private days? Or just write the whole thing off as being out of scope.

[hodgestar]

One could filter by day -- https://za.pycon.org/schedule/?day=2017-10-03. That doesn't hide the rest of the schedule, but it does allow one to announce part of the schedule before linking to the full thing.

[drnlm]

To do partial schedules, we'd have to change the validation logic, which is currently very all or nothing, since rendering invalid schedules is fraught with pitfalls.

It's probably not too hard to allow individual days to be valid, rather than the entire schedule, since we already render each day as it's own table. Combined with the per-day display, that might be enough for this use case.