CalcHub
Free Study CalculatorAs of 2026
Enter D-Day information
Event Name
Target date
Start date (for progress rate calculation)select
If you enter a start date, the progress rate relative to the total period is also calculated.
Calculation result
D
After entering the target date
Please press Calculate.
D-DAY
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event—
Target date—
Number of remaining days—
Remaining weeks—
Remaining months—
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What is a D-Day Calculator?
Calculate the number of days remaining until your target date. Use this to manage your study schedule for the CSAT, midterms, finals, school admissions, graduation, and more.
Refer to Key Study D-DAY
2027 Academic Year CSAT: November 12, 2026 (Thu)
2026 Academic Year CSAT: November 13, 2025 (Thu)
The College Scholastic Ability Test is held on the third Thursday of November every year.
2026 Academic Year CSAT: November 13, 2025 (Thu)
The College Scholastic Ability Test is held on the third Thursday of November every year.
If D-Day is 0, today is the target date; if it is negative, it is a past date. If you enter a start date, you can check the progress rate of how many % have elapsed relative to the total preparation period.
Frequently Asked Questions
When is the CSAT date every year?
The CSAT is held on the third Thursday of November every year. The 2026 academic year CSAT is on November 13, 2025, and the 2027 academic year CSAT is on November 12, 2026.
What are D+1 and D-1?
D-1 means one day before the target date, and D+1 means one day has already passed since the target date. This calculator displays the number of days remaining until the target date.