i just want to ask or there are any simple way to add to some date partial of month
for example to 2015-02-27 22:22:22 + 3.3429 of month
i searched google and i found only excel
my web page runs on linux mashie so i can calculate it on php, bash, sh, perl, ruby, and so on
i need it becouse i want to recalculate expiration date of some service that is sold to client
for example client have service wich one cost X/month, hes service expires on date yyyy-mm-dd hh:mm:ss and he want to change his service to diferent one wich one cost diferent price, so i need to get new expiration date, problem is that that each month have diferent number of days, so to calculate how much cost 1 second of his service is dificult.
btw sory for bad english