It's the 21st minute of the 21st hour of the 21st day of the 21st year of the 21st century

[Brick]

Remember that minutes and hours are 0-indexed, whereas days and years are 1-indexed (i.e. they start at 0 and 1 respectively), so the first hour for example starts at 12:00 a.m. midnight and lasts until 12:59 a.m., or 00:00 - 00:59 in military time, so 8:00 p.m., or 20:00, is the 21st hour. 

 

Thank you for reading my nerdy post for the day. I'm sure you've seen this going around already. 

[best3444]