What is Yesterday?

S0-SA5-0406

Grade Level:

Pre-School

Time, History, Computing, Finance

Definition

What is it?

Yesterday refers to the day before today. It is the immediate past day in the sequence of time, coming right before the current day.

Simple Example

Quick Example

If today is Tuesday, then yesterday was Monday. If you got a new cricket bat today, you might have planned to buy it yesterday.

Worked Example

Step-by-Step

Let's find out what day was yesterday if today is Thursday, 18th July 2024.
---Step 1: Identify the current day of the week. Today is Thursday.
---Step 2: Recall the sequence of days of the week. Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
---Step 3: Find the day that comes immediately before Thursday in this sequence. Wednesday comes before Thursday.
---Step 4: Identify the current date. Today is 18th July.
---Step 5: Find the date that comes immediately before 18th. 17th comes before 18th.
---Answer: Therefore, yesterday was Wednesday, 17th July 2024.

Why It Matters

Understanding 'yesterday' is fundamental for managing time, tracking events, and making plans. Historians study yesterday's events to understand the past, while computer programs often use 'yesterday's data' for analysis. Even in finance, yesterday's stock prices influence today's decisions.

Common Mistakes

MISTAKE: Confusing 'yesterday' with 'tomorrow' or 'the day before yesterday'. | CORRECTION: Remember 'yesterday' is always the day immediately before today.

MISTAKE: Thinking 'yesterday' is a fixed date, not a relative term. | CORRECTION: 'Yesterday' changes every day; it's always the day before the current day you are in.

MISTAKE: Not considering the date change when talking about 'yesterday'. | CORRECTION: If today is 1st August, yesterday was 31st July (a different month). Always adjust the date too.

Practice Questions

Try It Yourself

QUESTION: If today is Sunday, what day was yesterday? | ANSWER: Saturday

QUESTION: Your school started summer vacation on 15th May. You celebrated your birthday the day before vacation started. What was the date of your birthday? | ANSWER: 14th May

QUESTION: A train departed from Delhi at 8:00 PM yesterday and arrived in Mumbai at 10:00 PM today. How many full days did the journey take? (Hint: Think about when 'yesterday' ends and 'today' begins). | ANSWER: 1 full day (The journey spans from yesterday evening to today evening, crossing one midnight, meaning one full 24-hour cycle from yesterday to today).

MCQ

Quick Quiz

Which of the following describes 'yesterday'?

The day after tomorrow

The day before today

The current day

Any day in the past

The Correct Answer Is:

Yesterday specifically means the day that immediately precedes today. Options A, C, and D describe other timeframes, not the direct definition of yesterday.

Real World Connection

In the Real World

When you check your mobile data usage, many apps show 'Today's Usage' and 'Yesterday's Usage' to help you track consumption. Similarly, when you order food on an app like Swiggy or Zomato, you might see your 'Past Orders' which includes orders from yesterday, helping you re-order your favourite biryani easily.

Key Vocabulary

Key Terms

PAST: Time that has already happened | PRESENT: The current time, right now | FUTURE: Time that is yet to happen | DAY: A 24-hour period | SEQUENCE: An order in which things follow each other

What's Next

What to Learn Next

Now that you understand 'yesterday', you can explore 'tomorrow' and 'today'. These concepts build on each other to form a complete understanding of how we measure and talk about time.