The moon orbits the Earth over a period of 29.5 days from new moon to new moon, changing signs every 2.25 days. When the moon is considered void of course it means the moon has made it last major aspect in that sign, and will not aspect another celestial body until it changes signs.
Many interactions (transits) occur between the moon and various planets as it cycles around the earth every month. Each aspect typically lasts only a few hours, and there are typically 13 void periods each month, which can last from a few minutes to hours, sometimes as long as several days.
The moons transit through each sign sets the stage to affect our feelings. The moon is connected with our emotional life which changes daily. As the moon aspects various planets, this too can affect our moods and feelings, playing a role in the outcome of events that occur in our lives.
As the moon enters its void of course phase, it is as though it is taking a rest. For a short time we may feel out of sorts and it is considered best not to make major decisions or purchases during a void of course phase. Sometimes, we may not even notice this period it is so subtle, but decisions made will often not turn out as expected. During these periods it is best to focus on spiritual matters or reflect, rather than act, if possible.
Following are the void of course periods for the next 30 days. You can check it out for yourself. Time is EST.
January 18th 7:40 P.M. – 8:36 p.m.
January 20th 1:16 P.M. – January 21st 9:04 a.m.
January 23rd 6:42 A.M. – 10:00 p.m.. *** Moon is void all day
January 25th 3:35 P.M. – January 6th 9:20 a.m.
January 28th 11:56 A.M. – 6:27 p.m.
January 30th 8:59 P.M. – January 31st 1:36 a.m.
February 1st 8:03 P.M. – February 2nd 7:02 a.m.
February 4th 7:31 A.M. – 10:45 a.m.
February 5th 3:42 P.M. – February 6th 12:55 p.m.. Moon is void for a day
February 7th 7:44 A.M. – February 8th 2:17 p.m.
February 9th 2:20 A.M. – 4:20 p.m..
February 11th 12:03 P.M. – February 12th 8:51 p.m.
February 14th 10:35 P.M. – February 15th 5:08 a.m.