Up to date is an example of a phrase that can turn itself into a compound adjective – up-to-date. (A compound adjective is made up of two or more words that express one thought. In other words, it is not an up report, a to report, or a date report. It is an up-to-date report.)
Example (adjective phrase – Correct)
The forecast is not up to date.
Example (compound adjective – Correct)
The up-to-date forecast was included in the handout material.
Remember: Whenever a compound adjective appears before a noun, you must insert hyphens.
The up-to-date report is on my desk. (The adjective is before the noun.)
The report on my desk is up to date. (The adjective is not followed by a noun.)
I trust you are now up to date on this grammar point.