IE 11 - Columns are thrown off at certain widths

[derekwheee]

This happens every few pixels as I resize the browser. Saturday and Sunday become extra wide, and the layout gets very weird.

[derekwheee]

This seems to be an issue with the way IE rounds calc(). Using 99.99% instead of 100% fixes the issue:

.fc-calendar .fc-row > div,
.fc-calendar .fc-head > div {
    width: calc(99.99%/7);
}

[deviprsd]

refer #24
nothing is certain yet, you can try this also.