[matt]

Among my numerous sw apps for predicting planetary positions/views, I have AstroCalc.

Up until now I've found it to be excellent, especially for predicting GRS transits.

But I just encountered something really strange. I moved ahead to early tomorrow morning but instead of ticking over to May 1... it read April 31.

What the??? Has the IAU added an extra day in April or have I found a flaw in this otherwise nifty and reliable little proggie???

And what does this mean going forward? Will the program now be perpetually out by a day?