On IE 11 the width for days isn't calculated correctly since margins are (not?) taken into account. Using a value instead of calculation for the dr-day width seems to fix this, and works in all browsers (tested on IE11, Edge, Firefox , Chrome)
Appreciate the PR but a fixed width dr-day won't work as the width needs to be more fluid. Will spend some time trying to find a solution for this though.
On IE 11 the width for days isn't calculated correctly since margins are (not?) taken into account. Using a value instead of calculation for the dr-day width seems to fix this, and works in all browsers (tested on IE11, Edge, Firefox , Chrome)