Date countdown calculator

How the countdown works

The calculator measures the difference between right now and your chosen date and time, then converts that gap into whichever unit you select. It updates every second, so you can watch the minutes tick away in real time.

When you pick a date without setting a specific time, the countdown runs to midnight at the start of that day. If you want to count down to an event at a specific hour — a flight departure, a meeting, a birthday party — tap the time field and set it precisely.

Choosing the right unit

The default "all units" view shows days, hours, minutes, and seconds together — the most complete picture. But sometimes one unit is more useful:

• Months — useful for long-range planning (a holiday six months away).
• Weeks — good for project milestones or pregnancy tracking.
• Days only — the clearest single number for most events.
• Hours — great for same-day events like a flight or concert.
• Minutes / Seconds — useful for live events and launches.

Keep the countdown on your iPhone with Left

This web tool gives you a quick answer, but Left lets you put that countdown on your iPhone Home Screen, Lock Screen, or StandBy as a live widget — so you never have to open a browser. Add any date, name it, and watch the time shrink every day without lifting a finger.

Left supports dozens of widget styles: dots, bars, rings, numbers, and analog views. You can set up a countdown for a holiday, a wedding, a product launch, or anything else that pulls you forward.

Common uses for a date countdown

• Counting down to a vacation or trip abroad
• Tracking days until a job offer deadline
• Watching the days shrink before a wedding or birthday
• Knowing exactly how much prep time is left before a presentation
• Holiday countdowns: Christmas, New Year, Easter