5 min read
2026-02-14
Contracts and legal documents often specify business days. 10 business days is not 10 calendar days — it's approximately 14.
Public holidays can shift deadlines. In Russia, extended holidays in January and May significantly affect planning.
Instead of "submit in 30 days," calculate the specific date. This makes it easier to set reminders and plan your work.
When planning projects, add 15-20% extra time for unforeseen circumstances.
Manual day counting between dates often leads to errors, especially at month boundaries. Use the Date Difference tool for accurate results.
1 quarter = approximately 90 days
1 half-year = approximately 182 days
1 year = 365 or 366 days
See also: Age Calculator, Week Number