Dayslong

Origin

days + -long

Full definition of dayslong

Adjective

1. Lasting several or many days.
• 2015, Aug. 21, Julie Turkewitz, Thousands Stop to Smell a Flower (and Hope Not to Gag), When the flower’s skirt began to unfurl on Tuesday night, it was the end of a dayslong vigil followed throughout the city via a live-video feed called the StinkyCam.