SunCalculator v1.09e has been ported (2013/12/30) to OS/2 and eComStation.
"This is a tool for calculating Sunrise, Sunset and dawn times."

This port requires the Qt 4 libraries and libc libraries.
Link: ftp://ftp.netlabs.org/pub/qtapps/SunCalculator-1.09e-os2.7z
Office Web SIte: http://www.konarski-wuppertal.de/andreaskw/SunCalculator.html
Por by Elbert Pol