Raiser's Edge allows you to enter any number for a date, no matter how far into the future it is. Normally dates in the future are typos made on data entry, but RE accepts dates like 2090, 2104, etc. I would like to see a warning error pop up when a date is more than 5 or 10 years into the future.
Great if we could set the timeframe in business rules.
This would be nice but for now this is easily queryable with your daily/weekly/monthly data integrity audit queries.