*** Almanac for the currently specified date ***:
Almanac for ESO, Cerro La Silla:
long.   4 42 55 (h.m.s) W, lat. -29 15.4 (d.m), elev.  2347 m
Chilean Daylight Savings Time used before 2 AM 
2000 Mar 12 and after 2 AM 2000 Oct 8; standard zone =   4 hrs W

For the night of: Mon, 2000 Aug 14 ---> Tue, 2000 Aug 15
Local midnight = 2000 Aug 15,  4 hr UT, or JD 2451771.667
Local Mean Sidereal Time at midnight =  20 52 34.7

Sunset ( 2347 m horizon):   18 27 CST; Sunrise:    7 08 CST
Evening twilight:   19 39 CST;  LMST at evening twilight:   16 31
Morning twilight:    5 55 CST;  LMST at morning twilight:    2 49
12-degr twilight:  19 12 CST -->   6 23 CST; night center:    0 47 CST

Moonrise:   17 50 CST   Moonset :    7 46 CST   
Moon at civil midnight: illuminated fraction 1.000
0.1 days until full moon, RA and dec:  21 41 44, -16 14.1

The sun is down for 12.7 hr; 10.3 hr from eve->morn 18 deg twilight.
Bright all night (moon up from evening to morning twilight).