a period of twenty-four hours from one midnight to the next
We will leave tomorrow at eight in the morning and arrive the next day.
There are seven days in a week.
✦ Old English dæg, related to German Tag and Dutch dag.
the time between sunrise and sunset when it is light outside
It was a warm spring day filled with sunshine.
Owls usually sleep during the day and hunt at night.
a particular date or occasion when something happens
Her wedding day is set for June 12th.
The city celebrates Independence Day with fireworks.
the period of time when people usually work or study, as opposed to the evening or night
I work the day shift at the hospital.
She prefers to travel by day and rest at night.
a particular period or era in the past or future, often described by who lived then or by what happened
In my grandfather's day, people wrote letters instead of emails.
Someday, self-driving cars may rule the day.
the time it takes a planet to complete one full rotation on its axis
A Martian day is about 24 hours and 37 minutes long.
Scientists compare the length of a planet's day to understand its climate.
the day before today
Yesterday was my birthday.
We spent yesterday at the beach.
at a time very recently; not long ago
Smartphones that felt new only yesterday already seem old.
It seems like we were children only yesterday, and now we are adults.
a period of time when you do not go to work or school, often travelling somewhere for pleasure
School ends tomorrow, and our holiday to the seaside starts on Saturday.
They saved money all year for a two-week holiday in Greece.
the anniversary of the day a person was born, celebrated each year
Maria baked a chocolate cake for her son's birthday.
On his 10th birthday, Liam received a shiny red bicycle.
the anniversary of the founding or creation of something, such as a company, object, or idea
The museum held a special exhibit for its 100th birthday.
Google changes its logo on its own birthday each year.
