Blog
By Siavash Ghanbari · Founder of Emojar
📅7 Practical Ways to Use a Day of the Week Calculator
From planning a birthday party to checking an old letter's date, here are seven real situations where knowing the weekday of a date saves time.
Tool GuideDate & TimeDatesCalendar📅Counting Days for Deadlines, Notice Periods and Trips
Return windows, notice periods, countdowns and month-end deadlines: real scenarios for counting days between dates and adding time, with worked answers.
Tool GuideCalculatorsDatesPlanning➕How to Calculate a Deadline by Adding Days to a Date
Six everyday deadline calculations - 90-day windows, business-day turnarounds, month-end renewals and countdowns backward from an event - with worked answers.
Tool GuideDate & TimeDatesDeadlines💼How to Count Business Days Between Dates, Excluding Holidays
A checklist for accurate working-day counts - inclusive dates, the right weekend, observed holidays and holidays that fall on weekends - with 2026 examples.
Tool GuideDate & TimeDatesBusiness📆ISO Week Numbers Explained: Why Some Years Have 53 Weeks
How ISO 8601 week numbers work, why 1 January can be in week 53, how 2026 ends up with 53 weeks, and why your US calendar may show a different number.
Tool GuideDate & TimeDatesCalendars↔️Why Your "Days Between Dates" Count Is Off by One
Counting days between two dates gives different answers depending on whether you count nights or days. How to get the number you actually need, with examples.
Tool GuideDate & TimeDatesCalculators📆Convert Dates Between DD/MM/YYYY, MM/DD/YYYY and ISO 8601
Switch dates between day-first, US month-first and ISO formats, one or hundreds at a time, without guessing on ambiguous dates like 03/04/2026.
Tool GuideDate & TimeDatesFormats🏛️Roman Numeral Mistakes to Check Before a Tattoo or Engraving
Why 99 isn't IC, 1990 isn't MXM, and 49 isn't IL. The rules behind valid Roman numerals and how to format dates for tattoos, rings and invitations.
Tool GuideUnitsNumbersDates🎂How Exact Age Is Calculated in Years, Months and Days
Why is age counted in calendar months, and what happens to someone born on January 31 or February 29? A clear look at the method behind exact age.
Tool GuideCalculatorsDatesExplainer