Disclaimer: I'm an organiser of React Summit, React Advanced London and React Day Berlin - changes proposed in this PR is a small effort to actualise the list of events next to updating our own event dates
Next to updating own conference dates, I've made following changes:
* Removed 2020 events that, based on the current information from their websites, are cancelled or postponed without a new date
* Moved 2020 events that have actually ran to the "past events" section
* Updated dates of some events in 2020 that have not announced their cancellation, but moved dates within this year
What I didn't do:
* I haven't added 2020 cancelled events with their assumed 2021 dates, as it's up to organizers to confirm those and re-add
* To stay consistent with point above - I'm also not adding our (GitNation - React Summit, React Advanced) cancelled event dates that moved to 2021
* Conferences that have a past dates, but has not clear statement on the website about cancellation have not been removed, but rather moved to "past events" section
The information is relevant as of today's date - during these hard times plans do change frequently, so some information may be outdated by the time this PR is merged. I'll be happy to provide amends until it's merged.
Robert Haritonov
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