When will the Fruits Basket reboot start airing? It will show this year, but when is the exact date it will air?  Funimation and the team in Japan have officially announced to a simulcast meaning the agreement make it together aired and was an effort to decide to decide what time  was aleady reviewed and decided.  My research was able to find that it appeared to be in an agreement for early April to begin.
No exact date has been given yet other than "April 2019."

Source: https://comicbook.com/anime/2019/01/19/fruits-basket-reboot-character-designs-additional-cast/