Who said "Tomorrow is often the busiest day of the week."?

This quote is attributed to Petrarch.

Tomorrow is often the busiest day of the week. - Petrarch

"Tomorrow is often the busiest day of the week."

Petrarch

Poet Philosopher Italian 1304–1374

"To be everywhere is to be nowhere."

"Five centuries have passed since my birth, yet my heart still beats with the same passions."

"Love is the only thing that makes life worth living."

"The greatest wealth is a poverty of desires."