What does it mean to convert seconds into calendar time?

Calendar time is the time expressed by "seconds from standard time to now". This standard time point will be different for different compilers, but for a compilation system, this standard time point is unchanged, and the calendar time corresponding to the time in the compilation system is measured by this standard time point, so it can be said that the calendar time is "relative time", but no matter which time zone you are in, the calendar time at the same standard time point is the same. In C language, the calendar time is obtained by the time function.

Calendar time is represented by the data type of time_t, and the time represented by time_t is the number of seconds from a certain point in time (for example, 1970 1: 00: 00 on 0) to that time.

There should be a time handler to convert seconds into calendar time, which seems to be related to programming terminology. For example, in a system, the time required for you to send and receive data will be converted into calendar time or universal time in seconds (universal time such as a certain time, a certain month, a certain day, a certain minute and a certain second). Record time. I don't know what happened. . . I found these on the Internet. . . I hope I can help you. . .