These docs are for an old release.
Info on upgrading to v4
selectLongPressDelay 3.1.0
For touch devices, the amount of time the user must hold down before a date becomes selectable.
Integer, default: 1000 (1 second)
This value is specified in milliseconds. If not specified, it falls back to longPressDelay.
Only applicable when the calendar is being used on a touch device. Otherwise, there is no delay.