Is it possible to create tasks or projects according to the week(s) that the task or project is located in? Spanning by week numbers would also be nice. For example, a task that runs from Monday the 19th. of November - the start of week 47 - to Monday the 10th. of December - the start of week 50 can easily be set by spanning weeks 47 to 50. It also makes easier reference if tasks/projects were visible according to which week(s) of the year they are located in.