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JavaScript Date Components — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Date Components lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.

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Exercises(5)

  1. 1

    Read the hours

    easy10 min

    Report the UTC hours of the date.

  2. 2

    Read the weekday number

    easy10 min

    Report the weekday number, where Sunday is zero.

  3. 3

    Name the weekday

    easy10 min

    Use an array to turn the number into a name.

  4. 4

    Change the year

    easy10 min

    Set the year to 2027 and report it.

  5. 5

    Build a padded time

    medium10 min

    Show the time with leading zeros.

Find the bug(5)

  1. 1

    Fix getDate used for the weekday

    easy8 min

    getDate is the day of the month; getDay is the weekday.

  2. 2

    Fix the unpadded time

    easy8 min

    Single digits need a leading zero.

  3. 3

    Fix the year set with the wrong method

    easy8 min

    setUTCMonth changes the month, not the year.

  4. 4

    Fix the setter never called

    easy8 min

    The day was read without ever being changed.

  5. 5

    Fix the minutes read as seconds

    easy8 min

    The wrong getter gives the wrong part.

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