Federal government declares monday 12th public holiday

I'm not aware of any information that suggests the federal government has declared Monday, 12th as a public holiday. It's possible that you may have come across incorrect or outdated information.

In the United States, public holidays are typically declared by the federal government through the Presidential Proclamation process. The President has the authority to declare a national holiday, but it requires a formal proclamation and is usually done in advance.

If you're looking for information on public holidays in the United States, I recommend checking the official government website or a reliable news source for accurate information.