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DENVER — The days leading up to the big showdown between the Broncos and Seattle Seahawks will be a city-wide celebration of the Denver football team, proclaimed Denver Mayor Michael B. Hancock Friday.

“United in Orange, Time to Ride Week” starts Sunday at the Denver City and County Building with a special send-off message for the Broncos created by a chalk artist, said Hancock.

He also encouraged fans to show up Sunday from noon to 2 p.m., and create their own chalk messages for their favorite players. Gov. John Hickenlooper will also be in attendance, said Hancock, to help lead the event.

To keep the Broncos spirit thriving all week long, Hancock asked fans to post pictures or videos to his Facebook page, listing the following themes:

Monday: Broncos touchdown dances

Tuesday: Broncos pet

Wednesday: Broncos kids

Thursday: Broncos souvenirs

Friday: Broncos Super United in Orange – show your best interpretation of Broncos Nation

Fans’ photos and videos will be posted on the 14th Street jumbo-trons next Friday, said the mayor.

Hancock said he also plans to make a friendly mayor-to-mayor wager with Seattle Mayor Ed Murray.

Similar to “United in Orange” celebrations from earlier in January, the city will light up once again in orange and blue lights and fans will be asked to pull out their best Broncos apparel, said Hancock.

For more information on “United in Orange, Time to Ride Week,” visit DenverGov.org.