absence is a tool written in Perl calendar to keep track of people on a daily basis. absence is a calendar tool written in Perl to keep track of people (but could be adapted to any other object) on a daily basis.It is intended to replace the whiteboard over the boss's desk. You know the one where someone used a permanent marker to mark a matrix, and vacations / training / etc. are marked with permanent markers as blocks. absence is a CGI, and has a resolution of one day. It is not intended to be used for appointments or any other activity that requires a finer resolution. It generates an image for each month to be displayed using the GD library, and can be configured to produce PNG or GIF (or JPEG).