"She is alive in my heart," the CNN anchor wrote of his mother, who died last year at age 95.
The Reddit co-founder also publicly celebrated the special day by posting an Instagram photo of his "ride or die."
Barack and Michelle Obama are still the cutest couple after 27 years together.
The event honoring the 50th anniversary of the iconic festival was set to take place in a few weeks.
They faced strong disagreement on Twitter about whether the longtime co-host, fired for sexual misconduct, should have been skipped.
The star celebrated the 15th anniversary of her hit film by spotlighting the young actresses she worked with.
Sometimes, getting out of a relationship is worth celebrating.
Barack and Michelle Obama are still #relationshipgoals. Barack tweeted today at Michelle: “For 26 years, you’ve been an extraordinary partner, someone who can always make me laugh, and my favorite person to see the world with.”