Normally, if someone is asking for the date it is appropriate to tell them the present day's date and the current month. There would be some specific situations when it would be approrpriate to provide the year too. Let's take a look at the most common ways.
There are multiple different ways to write and say the date in English.
We could use ordinal numbers:
Today is the 24th of February.
Today is the April 2nd.
Or we could use cardinal numbers:
Today is February 24.
Today is April 2.
When writing the date in digit or number form there are two formats which are most common.
The most common form used in the United States of America is:
The most common form used elsewhere in the world is:
We use the preposition on when talking about a day of the week or a specific date in full form (day, month, year).
We use in when talking about longer periods of time, like months, seasons or years.
In the United States of America dates are generally written in the following form: Month / Day / Year
Elsewhere in the world dates are generally written in the following form: Day / Month /Year