*** Almanac for the currently specified date ***:
Almanac for Roque de los Muchachos:
long.   1 11 31 (h.m.s) W, lat.  28 45.5 (d.m), elev.  2326 m
pseudo-Greenwich Daylight Savings Time assumed from 2 AM on
2002 Mar 31 to 2 AM on 2002 Sep 29; standard zone =   0 hrs W

For the night of: Mon, 2002 Jun 10 ---> Tue, 2002 Jun 11
Local midnight = 2002 Jun 10, 23 hr UT, or JD 2452436.458
Local Mean Sidereal Time at midnight =  15 04 58.6

Sunset ( 2326 m horizon):   21 17 GDT; Sunrise:    7 05 GDT
Evening twilight:   22 43 GDT;  LMST at evening twilight:   13 48
Morning twilight:    5 39 GDT;  LMST at morning twilight:   20 45
12-degr twilight:  22 09 GDT -->   6 13 GDT; night center:    2 11 GDT

Moonset :   21 04 GDT   
Moon at civil midnight: illuminated fraction 0.000
0.0 days before new moon, RA and dec:   5 12 19,  22 29.1

The sun is down for  9.8 hr;  6.9 hr from eve->morn 18 deg twilight.
Dark all night (moon down from evening to morning twilight).