Contact - When?
Regarding time of year, there are no known seasons or months where Contact seemingly becomes more common. The below sections look into the times of day / night when Contact can occur.
Night-Time Hours
The majority of Contact experiences tend to take place after dark. The very early hours of the morning is often estimated or confirmed as the time the experience took place.
It should be noted that this is late enough for most people to be asleep, but before the morning light starts to appear in the sky. If the beings involved with contact are acting covertly (See Contact – Why?), then it would make sense for them to interact with experiencers when there is the lowest chance of external witnesses or outside interference.
Day-Time Hours
Contact does not always occur after dark. There are many cases on record (some of which have been extremely significant) which have occurred in broad daylight. For example there have been numerous reported school yard Contact incidents.
In some of these cases other factors, such as remoteness of location and altered states of awareness, help preserve a degree of secrecy, and reduce the possibility of independent witnesses. However at other times this does not seem to have been a concern.
To summarize, Contact can occur at any time of day or night. Other than the fact that more experiences appear to take place after the sun has set, there are no conclusive patterns which can be determined. Contact may be a highly orchestrated event and may occur at a time in which several factors are harmonized.