day

A day is a twenty-four period. It’s also the period of time that happens between sunrise and sunset. The word “day” is different from “today.” 

  • What do you do every day? 
  • What are you doing today? (today = on this present day) 
  • What day is today? (Answer: Today is Sunday.) 
  • Are you having a good day? 
  • Try to make every day count. 
English for the Planet

What a beautiful day it’s going to be! 

a. day = 24 hours

A day is a basic unit of time. It’s a 24-hour period. It’s the time when we live our lives, and it’s the amount of time we use to measure our lives. 

  • There are 365 days in a year. 
  • There are seven days in a week. 
  • There are 30 or 31 days in a month. 
  • What day is today? (Monday, Tuesday, Wednesday, etc. Each named day of the week is a day, not a date.) 
  • How many days a week do you work? 
  • In ten more days, it will be June. 
  • Tomorrow is Saturday. The day after tomorrow is Sunday. 
  • How many days does it take to go from here to New York? 
  • How many days will it take to finish this project? 
  • I look forward to every day of my life. 
  • Try to make every day count. 
English for the Planet
  • A: What do you do every day? 
  • B: I’m busy at work every day.(or)
  • B: I go to work every day.  
  • B: I go to school every day. 
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  • The measurement of a day is the full rotation of the Earth in relationship to the sun. This takes 24 hours to complete. 

b. day = daytime

A day is also the time available between sunrise and sunset,  or it’s the time between waking up and going to sleep. In this case, the opposite of day is night. 

  • What do you usually do during the day? 
  • I like to wake up early to begin the day.  
  • Many people begin the day with coffee or tea. 
  • At the end of the day, people go to sleep. 
  • How do you begin your day? 
  • Many people work during the day and sleep at night. 
  • It’s nice to be able to work outside while there is daylight. (The word “daylight” is a compound noun.) 
  • The sun goes down at the end of the day. 
woman standing on green field during daytime
  • For her, the day begins with a walk to work. 
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  • The opposite of day is night. 

c. daily

The word “daily” is a form of “day” that can be used as an adjective or as an adverb. 

  • What are your daily responsibilities at work? (adjective) 
  • Many people have a daily commute to work.  (adjective) 
  • I like to read the daily newspaper. (adjective) 
  • It’s a daily activity. (adjective) 
  • I read it daily. (adverb) 
  • You should exercise daily. (adverb) 
  • Walking daily is a good way to stay fit. (adverb)  
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  • His daily responsibilities require a lot of concentration. 

d. simple expressions that include the word "day"

  • What a day! (Today is beautiful.) 
  • I’m having a hard day. (I’m having some problems today.) 
  • I’ve had quite a day. (It was a hard day or it was an exciting day.) 
  • Let’s call it a day. (Let’s stop working and go home.) 
  • That really made my day. (That made me happy.) 
  • Make my day! (This is a famous quote from a Clint Eastwood movie in which his character dares someone to challenge him.) 
  • Have a good day! (This is another way to say “goodbye.”)
Aggressive African American female fighter wearing gloves punching black coach in activewear while practicing exercise during boxing workout in gym
  • He had a hard day today. 

Published on May 23, 2025