In Kibana 6, the time picker would automatically set the time to 00:00:00 for "from time" and 23:59:59 for "to time" when you selected a date i.e:
However, in Kibana 7.2, it seems to not bother changing the time after you've gone from a preset date period i.e. last 30 days. There's now a time picker to choose a time (which can be useful) but it's extra scrolling and clicking which didn't have to be done previously:
Just wondering if this was intentional or a bug and if it's going to be changed at some point?