New Year's resolution

On 3 January, birth rates would skyrocket across the Adipose nursery worlds as host species tried to stick to their New Year's resolutions to lose weight. (PROSE: Time Traveller's Diary)

On New Year's Day 2019, the Thirteenth Doctor made it her New Year's resolution to intercept a reconnaissance scout Dalek that had possessed Lin. (TV: Resolution)

Indeed, she once stated that her resolution every year was to defeat the Daleks. (PROSE: Scary Christmas and Unhappy New Year)