Florida Statutes (Title XIV — Taxation and Finance)
§ 192.047, F.S. — Date of filing
(1)
For the purposes of ad valorem tax administration, the date of an official United States Postal Service or commercial mail delivery service postmark on an application for exemption, an application for special assessment classification, or a return filed by mail is considered the date of filing the application or return.
(2)
When the deadline for filing an ad valorem tax application or return falls on a Saturday, Sunday, or legal holiday, the filing period shall extend through the next working day immediately following such Saturday, Sunday, or legal holiday.
Source: official text