Yesterday I have written a blog entry with a small program to calculate date and time from a given Unix time stamp.
Like my HP41 I have used an HP48 for a long time (I am using an HP50G until today). There are several emulators for HP48 calculators (Android, iOS and so on). I am running such an emulator on my Android phone. So I have written the same program for the HP48.
If you like it, I am happy. It’s not a program to solve the problems of the world but it’s still useful for a simple job.

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Simply enter the Unix timestamp (number of seconds) and run the program. The resulting date and time is shown in a message box.

More than 30 years ago I have used my HP41 to do the day work. Today there are several emulators for this very useful machine. So I have installed an emulator on nearly every device that I own. A stupid calculation that must often be done is to get the date and time based on a given Unix time. Unix time is given in seconds since 1.1.1970.
The calculation is easy done with a small HP41 program. If a CCD module or CCD OSX is installed (and a time module or the emulation of a HP41CX) only some lines of code are needed.
Here it is, a printout of a very simple program, that makes the job. Enter the Unix timestamp and run the program to get the real date and time.

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Today we are working on programs with million lines of code. Even simple programs often contain several thousand lines of code. Writing such a small program within minutes that makes a simple job without any gimmicks is sometimes more fun than creating big software systems. Last time I have written a program for my original HP41 is more than 25 years ago. It’s like riding a bike, learned once, never forgotten.