Date in booking method missleading somehow

Despite there for sure is explicit mathematical rule interpreting borders of date statements people feel uncertain about when booking starts and stops when adding only the date in "from and till" fields.

It would be better if there is a hint in the booking method wether the first and the last day is within or without the booking days, or adding the possibility to add time to it like start at 24.4.17 23.55 end at 26.4.17 23.55