Description:
------------
Line 207 of ext/standard/sunfuncs.c is:

RETURN_LONG((int) (time - (time % (24 * 3600))) + (int) 
(60 * ret));

since 'ret' is a double representing the number of hours 
since midnight the sun event occurred and 'time' is in 
seconds, the last multiplier should be number of 
seconds in an hour, not number of minutes in a hour:

RETURN_LONG((int) (time - (time % (24 * 3600))) + (int) 
(3600 * ret));

or, if you want to save one arithmetic step:

RETURN_LONG((int) (time - (time % 86400)) + (int) 
(3600 * ret));

This is also the cause of Bug?#30745.