Whenever you want to know

• how many days (or years, months, days) you have lived in this world,
• or how many days are left till His/Her birthday,
• or how long lasted Word War I,
• or the project you have been working on,
• or what date will it be 3 years, 5 months and 23 days from now
• or was 55 year, 9 months, 19 days ago -
  DaysCalcLt will give you the answer.
  Designed for simplicity of use, DaysCalcLt offers
  the most efficient and foolproof data entry:
  you never do more than 4 taps for a year,
  or 2 taps for a month or day.
  This version of DaysCalcLt for the Windows App Store uses
  the proleptic Gregorian calendar
  from 0001-01-01 AD to 9999-12-31 AD.
  The last computation is preserved.