The project management calendar templates can be designed in EdrawMax as the tool offers hundreds of free roadmap symbols and templates. These templates are 100% customizable and can later be shared in multiple formats as required. It should be noted here that the project management calendar defines the working and non-working days and times for tasks. This calendar usually represents the organization's traditional working hours. A project manager uses this project management calendar to schedule tasks that do not have resources assigned or have a fixed-duration task. It should be noted here that a critical path is the most important aspect of a project management calendar. A critical path is the sequence of dependent tasks that form the longest duration, allowing the team to determine the most efficient timeline possible to complete a project.