Every now and then, the Google logo transforms into colorful, interactive doodles to celebrate the world's pioneers, holidays and more.

Google goes gray for George H.W. Bush’s National Cathedral funeral

Search engine giant Google dulled its homepage logo gray in honor of former President George H.W. Bush’s funeral service at the Washington National Cathedral Wednesday.

» RELATED: George H.W. Bush funeral: What time are the services; how to watch

President Donald Trump declared the day a National Day of Mourning, closing all federal agencies and giving nearly all federal workers across the country the day off from work.

Funeral services for the 41st president will begin at 11 a.m. and broadcast on major networks, plus C-SPAN.

» RELATED: President Carter, former First Lady, to attend funeral of George H.W. Bush

Four men are scheduled to give eulogies for Bush: historian and author Jon Meacham, former Canadian prime minister Brian Mulroney, former Wyoming senator Alan K. Simpson and former President George W. Bush.

All of America’s former living presidents, including former Presidents Jimmy Carter and Barack Obama, will be in attendance. 

More about the funeral schedule, services and how to watch at AJC.com.