Does this calendar need an interface?

Your fictional teaching board will begin with imported synthetic calendar data. Another calendar provider may be added later. You propose a small adapter boundary.

1
Purpose
Which external difference should the adapter translate?
2
Cost
What does the adapter cost now, and what changes would it contain later?
3
Flip
When would directly parsing one stable file be the simpler adequate choice?

Your explanation

Use your own words. Include the evidence you would look for and the assumptions you are making.

Use synthetic information only. Notes are saved when you choose Save practice.