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Date methods

Learn getDate, getMonth and getFullYear methods.

Date methods

You access a Date object's components with methods. getFullYear() returns the four-digit year; getMonth() the month as a zero-based number (January=0, December=11); getDate() the day of the month.

Example: for new Date("2024-03-15"), getFullYear() returns 2024, getMonth() returns 2 (March), getDate() returns 15. For time there are getHours(), getMinutes(), getSeconds(). These methods work in the local timezone; for UTC use getUTCFullYear(), getUTCMonth(), getUTCDate(). For deterministic test output prefer the UTC methods. getDay() returns the day of the week (Sunday=0).

UTC methods

Local methods depend on the machine's timezone; they give different results in different countries. UTC methods (getUTCFullYear, getUTCMonth, getUTCDate) give the same result everywhere.

Example: for new Date("2024-03-15T00:00:00Z"), getUTCDate() is always 15. getDate() may be 15 in Istanbul (+3) but 14 in New York (-5). This is why test code uses UTC methods. Since the month is zero-based, you usually add 1 when displaying: getUTCMonth() + 1. Date formatting is the topic of the next lesson with Intl.DateTimeFormat; here we only pull components.

Practice Combine date components

Define const date = new Date("2024-03-15T00:00:00Z");. Print in day.month.year format with console.log(date.getUTCDate() + "." + (date.getUTCMonth() + 1) + "." + date.getUTCFullYear()).

Starter code

index.js
// Define a UTC date
// write here

// Print in day.month.year format
// write here

Sample solution

index.js
const date = new Date("2024-03-15T00:00:00:00Z");
console.log(date.getUTCDate() + "." + (date.getUTCMonth() + 1) + "." + date.getUTCFullYear());

Expected output

15.3.2024

Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 Complete the getFullYear call

Question 
const yil = date.____();
Answer 
const yil = date.getFullYear();

Explanation: getFullYear returns the four-digit year.

2 Match each method to its returned value

Term Meaning
getUTCFullYear Year (2024)
getUTCMonth Month (March=2)
getUTCDate Day of month (15)
getUTCDay Day of week

3 What does new Date("2024-03-15T00:00:00Z").getUTCMonth() return?

index.js
new Date("2024-03-15T00:00:00Z").getUTCMonth()
  • 0
  • 3
  • 2 Correct answer
  • 15

Explanation: March returns 2 because months are zero-based.

All lessons in Intermediate

1 Events

  1. EventEmitter
  2. on and emit
  3. once
  4. removeListener
  5. error event
  6. Summary - Events

2 Streams

  1. What are streams?
  2. Readable stream
  3. Writable stream
  4. pipe
  5. Transform stream
  6. Summary - Streams

3 HTTP server

  1. http.createServer
  2. Request and response
  3. Routing
  4. JSON response
  5. Query string
  6. Summary - HTTP server

4 Project: Helper library

  1. Module design
  2. String helpers
  3. Number helpers
  4. Date helpers
  5. Putting it together

5 Express basics

  1. What is Express?
  2. express()
  3. app.get
  4. app.post
  5. app.listen
  6. Summary - Express basics

6 Middleware

  1. What is middleware?
  2. app.use
  3. Router middleware
  4. Error middleware
  5. Body parser
  6. Summary - Middleware

7 Routing

  1. Route parameters
  2. Query parameters
  3. express.Router
  4. Route groups
  5. Method chaining
  6. Summary - Routing

8 Project: Quiz app

  1. Quiz model
  2. Adding questions
  3. Running the quiz
  4. Score calculation
  5. Putting it together

9 Async patterns

  1. Async iteration
  2. Async generators
  3. Concurrency limit
  4. Retry pattern
  5. Debounce and throttle
  6. Summary - Async patterns

10 Buffer and binary

  1. What is Buffer?
  2. Buffer.from
  3. Buffer.concat
  4. toString and encoding
  5. Buffer slice
  6. Summary - Buffer

11 Process and CLI

  1. process.argv
  2. process.env
  3. process.exit
  4. process.stdin/stdout
  5. Child process
  6. Summary - Process

12 Project: Library API

  1. Model design
  2. Express app
  3. CRUD routes
  4. Middleware
  5. Putting it together

13 npm and packages

  1. npm install
  2. package.json scripts
  3. devDependencies
  4. Semver
  5. npm publish
  6. Summary - npm

14 Error handling

  1. The Error class
  2. try/catch
  3. Custom errors
  4. Error middleware
  5. Unhandled rejection
  6. Summary - Error handling

15 Testing basics

  1. node:test
  2. assert
  3. describe and it
  4. Before and after
  5. Mock
  6. Summary - Testing basics

16 Debugging

  1. node inspect
  2. Chrome DevTools
  3. console methods
  4. util.inspect
  5. Source maps
  6. Summary - Debugging

17 Date and time

  1. The Date object
  2. Date methods
  3. Intl.DateTimeFormat
  4. performance.now
  5. setTimeout and setInterval
  6. Summary - Date and time

18 Crypto

  1. crypto module
  2. createHash
  3. randomBytes
  4. HMAC
  5. AES
  6. Summary - Crypto

19 URL and query string

  1. URL object
  2. URLSearchParams
  3. URL properties
  4. URL.resolve
  5. querystring
  6. Summary - URL and query string

20 Intermediate final

  1. Project design
  2. Express API
  3. fs persistence
  4. Middleware
  5. Putting it together