The chart shows the days when Jupiter appears only with 1 satellite because the others are occulted, eclipsed or in transit.

YEAR MM DD  hh mm ss   YEAR MM DD  hh mm ss   IEGC

2015  1  1   5 16 20   2015  1  1   7 33  7   1110
2015  1  4  20 21 53   2015  1  4  20 25 46   1110
2015  1  8   7 18 49   2015  1  8   9 18 18   1110
2015  1 24   7  8 58   2015  1 24   7 12 35   1101
2015  3  6  18 11  3   2015  3  6  18 49 35   1011
2015  8  4   5  8 14   2015  8  4   6 32 38   1110
2015  8  7  18  8 38   2015  8  7  19 13 37   1110
2015  8 11   7  9  2   2015  8 11   9 30 39   1110
2015  8 13   1 39 14   2015  8 13   4  9  4   1101
2015  8 14  20  9 27   2015  8 14  22 37 32   1110
2015  8 18  10 19  0   2015  8 18  11 34 32   1110
2015  8 22   0 30 13   2015  8 22   0 31 38   1110
2015 12 25  15 19  3   2015 12 25  17 16  7   1011


I = Io
E = Europa
G = Ganymed
C = Callisto

Legend: year/month/day/hour/minute/second of start and end
Io,Europa,Ganimede,Callisto (1=the satellite is eclipsed/occulted/in transit, 0=isn't)