As part of setting up your Campaign, you can create the Custom Facebook Fundraiser link (formerly 1-Click), and as part of this process, you have the option to set two different types of end dates.
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Either you can set a fixed end date which means any fundraisers that are created using your Custom Facebook Fundraiser link will have the fixed end date.

Or you can set a dynamic end date which means that any fundraisers created using your Custom Facebook Fundraiser link will have an end date of X days after the fundraiser has been created. This is perfect for ongoing campaigns where you might be recruiting fundraisers over a long period of time. This can currently be set up to 45 days from fundraiser creation.
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