The lesson for this week is: If you just hang in there until Friday, good things await.

On this, our National Donut Day, pastry powerhouse Dough (of the Insta-star Hibiscus Doughnut) is introducing a new flavor: Matcha Sugar.

RELATED: Where to get all the free doughnuts for National Donut Day

Inspired by the trendy Japanese green tea that has blown up in recent months, the new flavor will be available at all Dough locations, including their newest outpost at the Times Square food hall City Kitchen. Only a few batches are being made, so maybe swing by before the Summer Friday hordes descend on Midtown.

Foursquare revealed this week that Dough's 305 Franklin Ave. location is the highest-rated doughnut shop in the city. Doughnut Plant (#3), Peter Pan Donut & Pastry Shop (#5) and Dun-Well Doughnuts (#12) also made the top 20.

While you're thinking about unique doughnuts, check out our picks for five weird and wonderful flavors worth the trip.

Eva Kis is on Twitter @thisiskis, where she talks about pop culture, cats and media almost as much as food. Looking for something to do? Plan your day, week or month with our events calendar.