Pierre Millotte created the Night calendars series to show an important feature of human being : the search for the beloved and the need to get through the night near a warm body.
The rule laid is to paint black the nights spent alone and to use the color for nights spent accompanied.
The created paintings develop over a period of six months to a year.
Between black and coloured monochromes, intermediate results are the most interesting with their variety that expresses the inexhaustible impulse for life.

The latest Night Calendars show nights spent alone in white rather than black.
In addition, some overlap the time axes, allowing a much longer period of time to be displayed, up to three years.

The small Night Calendars, painted on MDF paving stones, run for 5O days each, i.e. just over a month and a half. They are taken from the twenty-year period covered by the large-format series (1981-2001).