According to the White House:

"NOW, THEREFORE, I, JOSEPH R. BIDEN JR., President of the United States of America, by virtue of the authority vested in me by the Constitution and the laws of the United States, do hereby proclaim March 31, 2024, as Transgender Day of Visibility. I call upon all Americans to join us in lifting up the lives and voices of transgender people throughout our Nation and to work toward eliminating violence and discrimination based on gender identity," the statement read. 

And where Easter is typically held the first Sunday after the full moon occurs on or after the spring equinox, while "Transgender Day of Visibility" is on the same date each year, many have taken offense to the day's proximity to the Christian holiday.

As for the White House's Easter egg design submission...  

"The Submission must not include any questionable content, religious symbols, overtly religious themes," a flyer with instructions from the White House stated.