How many days are between two dates?
Quick answer
Subtract the start date from the end date using calendar dates at the same local time boundary. The result can then be expressed as total days or grouped into weeks and days.
What about months?
Months do not have a fixed length, so a single “months apart” number is usually approximate unless the calculation is expressed as calendar years, months and days.
Why EgoTools separates exact maths from estimates
Exact date calculations use calendar arithmetic. Estimates are labelled as estimates, and entertainment results are labelled as entertainment rather than presented as scientific population facts.