JS Practice — Built-in Objects

setFullYear() — set to 2025

📖 Usage Example

const d = new Date(2024, 0, 15)
d.setFullYear(2030)
d.getFullYear()  // → 2030

Use setFullYear() to mutate the year of a Date object in place; the month and day remain unchanged.

Date.prototype.setFullYear()

Mutates the Date in place, setting the year. Returns the new timestamp as a number.

Challenge: Verify that after setFullYear(2025), getFullYear() returns 2025.

💡 Hints (1)

• setFullYear() mutates the Date object in place — it does not create a new Date