e-cal-time-util Time management utility functions. @year: @month: @Returns: @day: @month: @year: @Returns: @day: @month: @year: @Returns: @year: @Returns: @year: @Returns: @t: @Returns: @str: @Returns: @time: @days: @Returns: @time: @weeks: @Returns: @t: @Returns: @t: @Returns: @time: @days: @zone: @Returns: @time: @weeks: @zone: @Returns: @time: @months: @zone: @Returns: @time: @zone: @Returns: @time: @zone: @Returns: @time: @week_start_day: @zone: @Returns: @time: @zone: @Returns: @time: @zone: @Returns: @date: @time: @zone: