The last week of the year - in between Christmas and New Years - is the single best time to ask for donations online.
At Network for Good, we see our giving spike to incredible levels in the last week of every year. That's because online giving is perfectly suited to philanthropic procrastinators who want to get in their donations by the end of the tax year. Our giving is expected to go from about $70,000 on December 1 to well over $1 million a day for the final days of the year. That amounts to an increase of over 1300% in online donations on our site!

Following the graphed numbers you see above, last December 28th Network for Good sent a one-sentence reminder to our donors in an attractive html and got back what equates to a $50 donation for every email sent within hours. When people are making their last-minute gifts you want to be at the forefront of their mind.
Please remember to send out a last-minute email appeal to your donor base and potential donors in the last few days of the year. Ask those folks who have not given recently to make a year-end donation to your organization online. If you don't have a way for them to give online, get a DonateNow button for free at Network for Good. Or, go to Network for Good, search for your charity, click on "donate" and then share that URL with your mailing list. There is no better time to ask for support online and it should be taken as an absolute must for any nonprofit organization. So do it!