Ending lease without written notification
I live in Central NY, and have a month to month lease with my landlord. She has decided to terminate our lease at the end of the month, however she has not given us written notification, only an email, and has not included a date, just ASAP. We have asked her to move out on July 15th (our lease would technically end on June 15th) but she has refused (but still not given us a date or written notification.) Is this legal? Isn't she required to give us written notification with an exact date?