Find out exactly how many days until any date — a birthday, holiday, deadline or exam. Also counts the days between two dates and Australian business days excluding weekends.
| Unit | Value |
|---|
To find how many days until any date, enter it in the "Days Until / Since an Event" box above — the calculator subtracts today's date from the event date and shows the exact day count instantly, updated live every time you visit (never a stale, pre-written number).
The calculation is simple date subtraction: convert both dates to a day-count from a fixed reference point, then subtract. In practice this means taking the difference in milliseconds between the two dates and dividing by the number of milliseconds in a day (86,400,000), which cancels out time-of-day so only whole days are counted.
| Question | What it needs | Tool above |
|---|---|---|
| "How many days until [date]?" | Just the target date — today is assumed as the start | Days Until / Since an Event |
| "How many days between [date A] and [date B]?" | Two specific dates, neither necessarily today | Count Days Between Dates |
| "How many business days until [date]?" | Target date, excluding weekends (and optionally public holidays) | Count Days Between Dates (business-day row in results table) |
| Mistake | Why it's wrong |
|---|---|
| Counting both the start and end date as full days | Whether to include the end date changes the total by exactly 1 — this calculator lets you choose "include end date" explicitly |
| Ignoring time zones in code | Parsing a date-only string as UTC (a common web-development bug) can shift the calculated day count by one for users in certain time zones |
| Assuming "business days" excludes public holidays automatically | Business-day counts here are Monday–Friday only; state-specific public holidays are not automatically excluded since they vary by location |
| Forgetting leap years in long-range counts | Multi-year day counts must include the extra day in each leap year, or the total will be off by one day per leap year crossed |
Business days exclude Saturdays, Sundays, and public holidays. Public holidays vary by state. This calculator counts Mon–Fri as business days (a conservative count, as it does not include state-specific holidays) — for deadlines that specifically exclude public holidays, cross-check against your state's official public holiday calendar, or use the upcoming holidays list to the right as a starting reference.
Beginner:
24 days.
14 days (2 weeks).
Advanced:
20 business days (4 full 5-day weeks).
16 November 2026.
| Event | Typical Date | Days from 1 Jan |
|---|---|---|
| Australia Day | 26 January | 26 days |
| Easter (approximate) | March/April | Varies |
| ANZAC Day | 25 April | 115 days |
| End of financial year | 30 June | 181 days |
| Christmas Day | 25 December | 359 days |
How do I find out how many days until a specific date?
Enter the date in the "Days Until / Since an Event" box above. The calculator subtracts today's date from your chosen date and shows the exact number of days remaining (or, if the date has passed, how many days ago it was) — recalculated live every time you load the page.
How do you count days between two dates?
Convert both dates to day numbers (days since a fixed reference point, like January 1, 4713 BC in the Julian calendar system), then subtract. Most programming languages and spreadsheets have built-in date subtraction. For example in Excel: =B2-A2 (with date-formatted cells) gives the number of days between two dates.
How many days until Christmas?
Use the day counter above with 25 December entered as the event date — it shows the exact number of days from today, recalculated live so it's always correct no matter when you visit.
Does the day count include today or the target date?
The "Days Until / Since an Event" tool counts whole days between today and the target date. The "Count Days Between Dates" tool gives you an explicit "include end date?" toggle, since whether the last day counts as a full day depends on what you're using the count for (e.g. inclusive leave counts vs exclusive date-difference maths).
How does the day counter work?
This day counter estimates the number of days between two dates. Enter a start and end date and it counts the total days, useful for deadlines, leave, and project planning.
What is the difference between calendar days and business days here?
Calendar days count every day including weekends. Business days, as shown in the results table, count Monday to Friday only — this tool does not automatically exclude state-specific Australian public holidays, since these vary by location, so always double-check against your state's calendar for holiday-sensitive deadlines.