Date range check for multiple schedules

[johnjohndoe]

Context

Currently, the schedule.py script checks if the date range of the "other schedule" matches the date range of the "primary schedule".

if day["date"] != self.day(target_day)["date"]:
    log.error(f"  ERROR: the other schedule's days have to match primary schedule, in some extend {day['date']} != {self.day(target_day)['date']}!")
    return False

Question

• The following example shows that the "other schedules (workshop, academic) can be within the range of the "primary schedule" although the former start later or end later or both.
• Therefore my question: Does the above check have to be that strict or can it allow a "contains case"?
  I do not have enough insights to feel qualified to rate negative effects which might be caused if the check is changed.
• It would be great if the error message could state the reasoning for the check.

Example

• https://talks.osgeo.org/foss4g-2023/schedule/export/schedule.json -> 2023-06-26 - 2023-07-02
• https://talks.osgeo.org/foss4g-2023-workshop/schedule/export/schedule.json -> 2023-06-26 - 2023-07-01
• https://talks.osgeo.org/foss4g-2023-academic-track/schedule/export/schedule.json -> 2023-06-28 - 2023-07-01