             o  ,    o  ,                                   LONGYEARBYEN NO                            Astronomical Applications Dept.
Location: E015 39, N78 13                               Civil Twilight for 2023                        U. S. Naval Observatory
                                                                                                       Washington, DC  20392-5420
                                                            Universal Time


       Jan.       Feb.       Mar.       Apr.       May        June       July       Aug.       Sept.      Oct.       Nov.       Dec.
Day Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End  Begin End
     h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m   h m  h m
01  ==== ====  0952 1232  0540 1643  0055 2122  //// ////  //// ////  //// ////  //// ////  //// ////  0348 1742  0739 1341  ==== ====
02  ==== ====  0937 1247  0532 1650  0038 2142  //// ////  //// ////  //// ////  //// ////  //// ////  0355 1734  0748 1332  ==== ====
03  ==== ====  0923 1301  0525 1658  0018 2208  //// ////  //// ////  //// ////  //// ////  //// ////  0403 1726  0757 1322  ==== ====
03                                   2351
04  ==== ====  0911 1314  0517 1705  //// ////  //// ////  //// ////  //// ////  //// ////  //// ////  0410 1719  0807 1313  ==== ====
05  ==== ====  0859 1325  0510 1712  //// ////  //// ////  //// ////  //// ////  //// ////  //// ////  0417 1711  0817 1302  ==== ====
06  ==== ====  0849 1336  0502 1719  //// ////  //// ////  //// ////  //// ////  //// ////  //// ////  0424 1703  0828 1252  ==== ====
07  ==== ====  0838 1347  0454 1726  //// ////  //// ////  //// ////  //// ////  //// ////  //// ////  0431 1656  0840 1240  ==== ====
08  ==== ====  0829 1357  0447 1734  //// ////  //// ////  //// ////  //// ////  //// ////  2346 2207  0438 1648  0852 1228  ==== ====
09  ==== ====  0819 1406  0439 1741  //// ////  //// ////  //// ////  //// ////  //// ////       2139  0445 1641  0906 1214  ==== ====
10  ==== ====  0810 1415  0431 1749  //// ////  //// ////  //// ////  //// ////  //// ////  0012 2119  0452 1633  0922 1159  ==== ====
11  ==== ====  0801 1424  0423 1756  //// ////  //// ////  //// ////  //// ////  //// ////  0032 2102  0459 1626  0941 1140  ==== ====
12  ==== ====  0753 1433  0415 1803  //// ////  //// ////  //// ////  //// ////  //// ////  0049 2047  0506 1618  1010 1111  ==== ====
13  ==== ====  0744 1441  0407 1811  //// ////  //// ////  //// ////  //// ////  //// ////  0103 2033  0514 1611  ==== ====  ==== ====
14  ==== ====  0736 1450  0359 1819  //// ////  //// ////  //// ////  //// ////  //// ////  0116 2020  0521 1603  ==== ====  ==== ====
15  ==== ====  0728 1458  0351 1826  //// ////  //// ////  //// ////  //// ////  //// ////  0128 2008  0528 1556  ==== ====  ==== ====
16  ==== ====  0719 1506  0343 1834  //// ////  //// ////  //// ////  //// ////  //// ////  0139 1957  0535 1548  ==== ====  ==== ====
17  ==== ====  0711 1514  0335 1842  //// ////  //// ////  //// ////  //// ////  //// ////  0150 1946  0542 1541  ==== ====  ==== ====
18  ==== ====  0704 1522  0326 1850  //// ////  //// ////  //// ////  //// ////  //// ////  0200 1936  0549 1533  ==== ====  ==== ====
19  ==== ====  0656 1529  0317 1859  //// ////  //// ////  //// ////  //// ////  //// ////  0210 1926  0556 1526  ==== ====  ==== ====
20  ==== ====  0648 1537  0309 1907  //// ////  //// ////  //// ////  //// ////  //// ////  0219 1916  0604 1518  ==== ====  ==== ====
21  ==== ====  0640 1545  0300 1916  //// ////  //// ////  //// ////  //// ////  //// ////  0228 1907  0611 1510  ==== ====  ==== ====
22  ==== ====  0633 1552  0250 1925  //// ////  //// ////  //// ////  //// ////  //// ////  0237 1858  0618 1503  ==== ====  ==== ====
23  ==== ====  0625 1559  0241 1934  //// ////  //// ////  //// ////  //// ////  //// ////  0245 1849  0626 1455  ==== ====  ==== ====
24  ==== ====  0617 1607  0231 1943  //// ////  //// ////  //// ////  //// ////  //// ////  0254 1840  0633 1447  ==== ====  ==== ====
25  ==== ====  0610 1614  0221 1953  //// ////  //// ////  //// ////  //// ////  //// ////  0302 1831  0641 1439  ==== ====  ==== ====
26  ==== ====  0602 1621  0211 2003  //// ////  //// ////  //// ////  //// ////  //// ////  0310 1823  0649 1431  ==== ====  ==== ====
27  ==== ====  0555 1629  0200 2014  //// ////  //// ////  //// ////  //// ////  //// ////  0318 1814  0657 1423  ==== ====  ==== ====
28  ==== ====  0547 1636  0149 2026  //// ////  //// ////  //// ////  //// ////  //// ////  0325 1806  0705 1415  ==== ====  ==== ====
29  ==== ====             0137 2038  //// ////  //// ////  //// ////  //// ////  //// ////  0333 1758  0713 1407  ==== ====  ==== ====
30  1039 1144             0124 2051  //// ////  //// ////  //// ////  //// ////  //// ////  0341 1750  0721 1358  ==== ====  ==== ====
31  1011 1212             0110 2105             //// ////             //// ////  //// ////             0730 1350             ==== ====

(//// Sun continuously above twilight limit)                                              (==== Sun continuously below twilight limit)

Add one hour for daylight time, if and when in use.