Blink 182 Honoring 9/11 Victims ... and Supporting Burn Center

Travis Barker and his Blink-182 bandmates are giving up their time and a ton of money to mark the 9/11 anniversary in NYC ... TMZ has learned.

Blink-182 is currently on tour -- and even though it was supposed to be an off-day -- we're told they decided to add tomorrow night's gig in Brooklyn as a 9/11 tribute.

Sources connected to the band tell us all the money raised from the concert will be donated to multiple hospitals ... including City of Hope and William Randolph Hearst Burn Center in NYC.

We're told Travis wanted to support one of NY's leading burn units because of the horrific injuries he and DJ AM suffered in the plane crash 5 years ago.

Blink 182 Singer Tom DeLonge SAVES Stage Crasher's Life ... With a Towel

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A disoriented six-legged fan crashed the stage at a Blink 182 concert Saturday night in Pennsylvania -- and singer Tom DeLonge stopped the ENTIRE concert just to save its life ... using nothing but a towel.

By all accounts, the singer really winged it.