__daylen__         30 ext/date/lib/astro.h         __daylen__( year, month, day, lon, lat, -35.0/60.0, 1 )
__daylen__         36 ext/date/lib/astro.h         __daylen__( year, month, day, lon, lat, -6.0, 0 )
__daylen__         42 ext/date/lib/astro.h         __daylen__( year, month, day, lon, lat, -12.0, 0 )
__daylen__         48 ext/date/lib/astro.h         __daylen__( year, month, day, lon, lat, -18.0, 0 )