Some sources give the age, which the mentioned person lived out, but to within whole year, but there are errors resulting from a simple subtraction of the life existence (and accurately - of the birth) and its end, indeed if someone was born in December 2000 and died in May 2007 channels usually claim he was 7, in fact however he was 6, he would have been 7 (completed) years old if he had died no sooner than in his seventh birthday.
It is possible to find 365 people who have achieved equal age (given in years), but each of those persons lived the various number of days. In the most common way, we publish the age of any person in full years, what is vague but sufficient - usually there is not necessary to give the number of years, months and days.
I can be interesting to make exact calculations for some well-known persons, locating our own existence (which usually is not very significant) among those numbers and to compare, in which place we are in relation to considered persons. If the day (when we have taken a want to compare) we already have been living longer or, after all, shorter than a genius or a criminal or simply a well-known man. It is also possible to observe current daily increasing of the analysed life, particularly the own one. If we observe the change (the revenue for next day),then we can state that observation optimistically - we are still alive! During calculations it is possible to use secular calendars, which are available in the Internet; the Excel makes possible the subtraction of two any dates starting from the 1st of January 1900 (1900-01-01).
First, you should determine life’s parentheses (from-to) of the ‘counted’ person or phenomenon. It may happend, that somebody (besides his birthday) will celebrate every single thou, that is e.g. 7000th day of his life? If someone was born on (St.) Valentine’s Day 1953, he had his five-thousandth day of life the 24th of October 1966 (he was 13 years, 8 months and 10 days old then) and he certainly hadn’t got a foggiest idea of it. His 10000th day of life came the 2nd of July 1980 (he was 27 years, 4 months and 16 days) and the 15000th one - the 11th of March 1994 and this is already past,while his 20000th day of life was the 18th of November 2007 (he was 54 years, 9 months and 4 days). Then it will be more difficult to celebrate such a nice round thou, as the 25000th day of the life will happen the 27th of July 2021 (68 years, 5 months and 13 days), meanwhile the 30000th one - the 5th of April 2035 (82 years, 1 month and 19 days). Celebrations of the 30000th day after birth are under a big question mark, because it will have accrued the 12th of December 2048 (celebrator of the jubilee will have been 95 years, 9 months and 26 days then, if he proves to be remarkably enduring). Only theoreticaly it is possible to count his 40000th day of life, because it would be the 21st of August 2062 and he himself would be 109 years 6 months and 7 days then, which seems an improbable achievement, especially beetween the Oder and the Bug river. The enumerating next and even periods after five thousand days seems to be a superflous action - just a sake’s art.
Estimating the average man's life here and now for 75 years, it is possible to give a proportional 'realization of the plan' for each entity (in the table). One should to count these 75 years on days. We assume that the statistical (standard) native lived between 1st of January 1926 and 31st of December 2000, which took him 27,393 days. So that makes 365.24 days for one year.
For curiosity (and for superstitious people) you can specify the date of ‘birthday’ accruing to the 7777th day of life
If someone was born the 22nd of March 1986, he will celebrate this pleasant ‘birthday’ (with four sevens) the 7th of July 2007 (the date with three sevens and four zeros: 2007-07-07).
To have 7777 days of life (in day) 2077-07-07 one should to be born the 22nd of March 2056, that’s one should think about the problem seriously in less than a half of century, remembering about the three-quarterly outdistance. In both cases the young people will be 21 years, 3 months and 16 days... If these guidelines are still circulating on the Internet, maybe someone will approach to the work? After inventing the Valentine’s Day an avalanche of greetings cards started. Maybe postcards sent on the occasion of the 7777th day of life or full thous will be caught on?
The Second Polish Republic lasted from the 18th of November 1918 till the 25th of September 1939, that’s 7623 days. If we assume that the Third RP (Republic of Poland) lasts from the 4th of June 1989, the 18th of April 2010 times of existence of both Republics will be equal. This day it will be possible to estimate achievements of the pre-war Poland and the present democratic one symbolically.