S3 per-route timetable files are empty for date key 2020-02-03

[exxonvaldez]

The timetable files for date key 2020-02-03 contain no arrivals. For example, the contents of http://opentransit-data.s3.amazonaws.com/timetables/v1/muni/2020-02-03/timetables_v1_muni_2020-02-03_1.json.gz are:

{"version":"v1","agency":"muni","route_id":"1","date_key":"2020-02-03","timezone_id":"America/Los_Angeles","service_ids":["1_merged_9191495"],"arrivals":{}}

Edit: this affects production and my dev build. I cannot get schedule adherence stats at the stop to stop level for dates from Feb 3 to Feb 21. Route summary does work.

Not sure if this is a known issue to @youngj .