How to find out what the date was 5 days ago

Question

Well  the following returns what date was 5 days ago    days ago   date  Y-m-d   mktime 0  0  0  date  m     date  d   - 5  date  Y        But  how do I find what was 5 days ago from any date  not just today   For example  What was 5 days prior to 2008-12-02

User · Answer

Try this   date   date  Y-m-d   strtotime  -5 day

User · Answer

General algorithms for date manipulation convert dates to and from Julian Day Numbers   Here is a link to a description of such algorithms  a description of the best algorithms currently known  and the mathematical proofs of each of them  http   web archive org web 20140910060704 http   mysite verizon net aesir research date date0 htm

User · Answer

define  SECONDS PER DAY   86400    days ago   date  Y-m-d   time   - 5   SECONDS PER DAY     Other than that  you can use strtotime for any date    days ago   date  Y-m-d   strtotime  January 18  2034   - 5   SECONDS PER DAY     Or  as you used  mktime    days ago   date  Y-m-d   mktime 0  0  0  12  2  2008  - 5   SECONDS PER DAY     Well  you get it  The key is to remove enough seconds from the timestamp

User · Answer

find out what the date was 5 days ago from today in php   date   strtotime date  Y-m-d   strtotime  -5 day        find out what the date was n days ago from today in php   date   strtotime date  Y-m-d   strtotime  -n day

User · Answer

Use the built in date sub and date add functions to math with dates   See http   php net manual en datetime sub php   Similar to Sazzad s answer  but in procedural style PHP     date   date create  2008-12-02    date sub  date  date interval create from date string  5 days     echo date format  date   Y-m-d      outputs 2008-11-27

User · Answer

simple way to find the same is    date   date  Y-m-d   strtotime  -5 days   strtotime  input date

User · Answer

If you want a method in which you know the algorithm  or the functions mentioned in the previous answer aren t available  convert the date to Julian Day number  which is a way of counting days from January 1st  4713 B C   then subtract five  then convert back to calendar date  year  month  day    Sources of the algorithms for the two conversions is section 9 of http   www hermetic ch cal stud jdn htm or http   en wikipedia org wiki Julian day

User · Answer

5 days ago from a particular date    date   new DateTime  2008-12-02     date- gt sub new DateInterval  P5D     echo  date- gt format  Y-m-d       n

User · Answer

Simply do this   hope it help   fifteendaysago   date create  15 days ago    echo date format  fifteendaysago   Y-m-d

User · Answer

I think a readable way of doing that is    days ago   date  Y-m-d   strtotime  -5 days   strtotime  2008-12-02

[php] How to find out what the date was 5 days ago?

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