If you're planning a "lottery" charity event, then design calendars for the winners that reflect your mission. Winners will receive the calendars along with a cash prize. Form a team of graphic designers and creative people to gather or take the photographs and design the calendar. Try to reduce cost by using free or inexpensive resources and by bargaining on production costs.
Global Photo Calendar
If your organization works with vulnerable people across the world, then design a calendar that features photographs of the wonderful people that you help. It is okay to use photographs that communicate the realities of poverty, malnutrition and sickness in the communities you are helping. However, there is a difference between showing the truth and manipulating it. Include photos that show the hope and the positive change that your organization is making with the help of donors.
Staff Photo Calendar
Take photos of key staff in your organization. They can be at work in the office or in the field. Be sure to include a story about each person's role or maybe a relevant story in the person's own words. This is a great way to incorporate photos and storytelling. For example, you might get a shot of a staff person who works with water sanitation helping to install a water pump in a remote village. Half of the page can show the photo, while the other half can display a story about his or her work.
"I Spy" Calendar
Using the general principle behind "I Spy" books, in which the viewer is invited to locate specific objects in the muddle of many random objects, make an "I Spy" calendar. You might want to use one specific object---such as the organization's logo or symbol---as the object that the calendar viewer will be asked to find on each page. You can even keep with the concept of the other two calendar ideas featured above, but on each page insert the object somewhere. The viewer then will be invited to "spy" for the object and locate it.