Weekly Chats widget is frequently incorrect

[crstauf]

The "Weekly Chats" widget on make.wordpress.org is nearly always incorrect. Initially I thought it was a caching problem, but after checking for a few days, that does not seem to be the case.

[First noticed the issue](​https://cloudup.com/cd4_mqFeEMP) on Monday at 16:57 UTC right after #docs meeting, on this page: ​https://make.wordpress.org/docs/2020/03/16/external-linking-in-docs-policy/.

Checked again today, and it's even stranger, saying that there's a meeting today in one hour: ​https://cloudup.com/iBbDHtw2W08.

From my perspective, there are two tasks involved in this ticket:

1. fix the scheduling glitch
2. implement JS to show the correct relative time to bypass cache

[crstauf]

screenshot of Weekly Chats widget with incorrect date and time

[ocean90]

This is caused by the "fix" in r15912-dotorg which no longer adds the next_date property, causing the next date to be an empty strings to gets converted to today.

The proper fix seems to be ​https://github.com/Automattic/meeting-calendar/pull/100.

[ryelle]

A ​fix for this was deployed, so meetings should show up correctly in widgets now.