Valenzuela City Police and city government personnel respond to the call for blood donation at the city hall, April 6, 2013.

Donors in uniform line up to have their vital signs checked before their turn at the blood letting activity at the city hall, April 6, 2013.

Friendly Red Cross volunteers facilitate the blood letting activity at the city hall's multi-purpose hall, April 6, 2013.

Blood letting activity of Philippine Red Cross Valenzula Chapter at the city hall's multi-purpose hall as part of City Mayor Sherwin Gatchalian's 39th birthday celebration, April 6, 2013.

Blood letting activity of Philippine Red Cross Valenzula Chapter at the city hall's multi-purpose hall as part of City Mayor Sherwin Gatchalian's 39th birthday celebration, April 6, 2013.

Blood letting activity of Philippine Red Cross Valenzula Chapter at the city hall's multi-purpose hall as part of City Mayor Sherwin Gatchalian's 39th birthday celebration, April 6, 2013.

As a matter of policy, donated blood are screened for diseases and other infections before being endorsed to the Red Cross' blood banks.

Mayor WIN, also a Red Cross governor, continues the tradition of donating blood on his 39th birthday.