Monday
Monday's claim to heroism remains, by any reasonable metric, profoundly limited. The day itself performs no rescue operations, saves no cats from trees, and has never once carried an unconscious person to safety. Its primary achievement involves existing with such reliability that humanity has built elaborate coping mechanisms around its arrival.
Some argue that Monday demonstrates a form of passive heroism by providing structure to the working week, but this interpretation requires considerable generosity of spirit. The day's most heroic act may simply be ending, typically around midnight, allowing Tuesday to assume its marginally less despised position.
Firefighter
The firefighter's relationship with heroism borders on the definitional. These individuals have selected a profession where the job description includes 'enter environments that are actively trying to kill you' and 'carry heavy equipment whilst doing so.' The cognitive dissonance required to choose this career path suggests either exceptional bravery or a fundamental misunderstanding of thermodynamics.
Studies indicate that firefighters routinely perform acts that would qualify as extraordinary in any other context but are considered simply Tuesday within their profession—or indeed Monday, though they approach that day with considerably less dread than the general population.