(a) Computation. Computation of time shall be governed by Florida Rule of Judicial Administration 2.514.
(b) Enlargement. When an act is required or allowed to be done at or within a specified time by order of court, by these rules, or by notice given thereunder, for cause shown, the court at any time in its discretion (1) with or without notice, may order the period enlarged if request therefor is made before the expiration of the period originally prescribed or as extended by a previous order, or (2) upon motion made and notice after the expiration of the specified period, may permit the act to be done when failure to act was the result of excusable neglect, but it may not extend the time for making a motion for new trial, for rehearing, or to alter or amend a judgment.