// compute the week day from day/month/year: we use the dumbest algorithm
// possible: just compute our JDN and then use the (simple to derive)
// formula: weekday = (JDN + 1.5) % 7
// compute the week day from day/month/year: we use the dumbest algorithm
// possible: just compute our JDN and then use the (simple to derive)
// formula: weekday = (JDN + 1.5) % 7
// we have to use our own implementation if the date is out of range of
// strftime() or if we use non standard specificators
#ifdef HAVE_STRFTIME
// we have to use our own implementation if the date is out of range of
// strftime() or if we use non standard specificators
#ifdef HAVE_STRFTIME