@Ivan2788 there isn't a way to revert back / reset those dates to a 'global pricing feature'. This is a clear flaw in Airbnb's design and I can't believe this isn't clearly stated in the UI when performing a manual change.
However, I also believe that the behavior is not fully functional for a series of reasons:
If you manually modify the price for a random Friday (i.e, 100$) and then turn ON the 'weekend pricing' feature (i.e, 120$), it automatically 'overrides' your manual input by adjusting Friday's price to 120$. This, unfortunately, does not seem to be the case for weekdays. In fact, if you manually set a weekday to 100$ and then perform a 'global base night' adjustment, the weekday will remain stuck on 100$ forever.
The above clearly indicates a flaw in the design, as there's indeed a 'tool' to override manual changes (Weekend Price feature or Smart Prices) but that's not extended to the whole calendar.
The general rule is:
"When you manually input a base night price for a weekday or a range of weekdays, it won't be possible to revert automatic price adjustments to the affected dates unless you decide to use Smart Prices"
The 'reasoning' behind Airbnb is: if a host input a specific price for that day (i.e., New Year's Even being priced 3x times more than usual) that's because they want that price to be baked in "forever", regardless of other factors that may change over time. I believe the feature is designed specifically for case scenarios in which the host wants fixed prices at all costs under specific circumstances (events, specific holidays and so on).
While Airbnb never states that clearly, I was able to infer the above just with trial and error - however my calendar is also experiencing a behavior that's unusual in light of the fact that:
"Despite not having manually modified the price for any dates, my prices are only reflected in weekends".
