I am trying to write a routine of my studies of next month.For that I want to write a timed schedule. That is a timed program that will tell me everytime I turn on my laptop which topics should I read at that date.I can divide a day into 3 parts,8AM-2PM,2PM-6PM and 6PM-8AM.. Now each time I turn on the computer or run the program, this will tell me what I should read at that time in that day. and Now I dont want any routine softwares, I want to write that program myself. which libraries should I use???that is which library of C++ deals with the time?