JS Practice — Built-in Objects

Date.UTC() — 1 second after epoch

📖 Usage Example

Date.UTC(2024, 0, 15)  // → 1705276800000
// month is 0-indexed
new Date(Date.UTC(2024, 0, 15)).toISOString()  // → '2024-01-15T00:00:00.000Z'

Use Date.UTC() to compute the millisecond timestamp for a UTC date without constructing a Date object first.

Date.UTC()

Adding 1 second (1000 ms) to the epoch: Date.UTC(1970, 0, 1, 0, 0, 1) returns 1000.

Challenge: Verify that Date.UTC(1970, 0, 1, 0, 0, 1) returns 1000.

💡 Hints (1)

• Date.UTC accepts (year, month, day, hours, minutes, seconds, ms) — 1 second = 1000 ms