Dates should not have a suffix on the number (10th, 23rd, etc.) if the month is present. (July 4, 1776, not July 4th, 1776). Only use the -th, -st, -nd, -rd suffixes if there is no month (“See you on the 23rd!”).

In everyday usage it is not necessary to append this year to a date (May 1 is sufficient; you don’t need to say May 1, 2019). You may not even need next year if it’s clear from the context what year it is (“Join us for our 2020 Conference on February 1 and 2”). Exception: legal language (contracts, disclaimers, official rules).