Green Day is teasing a 25th anniversary celebration for their 1997 ‘Nimrod’ record. The album is marking its 25th birthday this Friday and the band took to Instagram to tease the occasion and hint at some kind of event. The post featured the roman numerals XXV on a yellow and black background, mimicking the ‘Nimrod’ album artwork. It was captioned, “Someone’s got a VERY big birthday on Friday. Any guesses who??!” Green Day was also announced as headliners for the second edition of Las Vegas’ ‘When We Were Young’ festival this week. What’s the best Green Day album?