iPhone alarm didn't work

News is in that iPhone 4 alarm didn't work on 1st and 2nd Jan. Amazing!
And they already had a problem when the clocks went forward in November. All around the world iPhone 4 alarms did not go off.
Digital clock/calendar software is so so easy. I did it 30 years ago. Incredibly simple! How on Earth can Apple get it wrong?
Because the software in these things is so immense and so geared to looking good that simple things like it actually working can be neglected. Even my own phone sometimes needs reminding that it is first and foremost a phone and a gadget second.
Testing is obviously something that didn't happen. Engineers are supposed to test. I remember when I programmed digital clock/calendar I took the trouble to set up possible special cases like daylight saving, new years, leap years. Wait for it let's see if the iPhone alarms work properly on Feb 29th 2012.