How to tell how old an egg is?

Saw this from FB, thought it's pretty interesting. Will try on my eggs when I'm home. They hv been in my fridge for weeks. 😁 #repostfromfb

#ootd

#aotd

Quick lunch fix at Sushi Burrito Expresso. Ordered "Rising Sun". $6.90 for a half roll and a drink. Yummy!! Love it. 😋😋

Topokki for dinner.. $6.50 😁😋

Goodnight Dayreans! 😴😴