Pop-up calendar enable a range of possible selections


We are having a timeline functionality with one of our clients where various states are showcased. Since the states change quite often we have limited the date selection range to 72h.

The problem is that currently if the range is exceeded, the algorithm takes that selection and a 24h timeframe from or to that date, based on which selection (date from or date to) the client exceeded the range. This however does not look good for the client so I thought of 2 possible solutions:

  1. Give a pop-up notification to the client stating that the range was exceeded and a 24h frame will be used.
  2. Once a client selects a from date, the to date has out of range possibilities disabled.

Could the selectable dates be somehow disabled? Is there a better solution for this?