Skylendar has an issue when compiled with gcc 7.3 x86_64 in Released mode.( CXXFLAGS=-O3) The default Now chart is 1 houre late, at least on my computer. If it is a problem for you, use it compiled in debug mode i.e.:
cmake -DCMAKE_BUILD_Type=Debug -DCMAKE_INSTALL_PREFIX=xxx yyy
Notice that it also exists a skylendar application for android, but this one has nothing to do with the genuine skylendar astrology program on sourceforge.
I regret the lack of creativity of the author of this android program. Why have you been unable to find out a proper name for your app ? :-(