Donating on your birthday will make your birthday feel more special. This year, in lieu of gifts, empower your loved ones to spark change by making a donation to an organization working for the eternal benefits of people by distributing spiritual knowledge. Donating on every tithi of your birth which falls on every month gives you lots of benefits and protections from all possible dangers of life, it also eliminates effects of past karmic debts.
The anniversary gives you a chance to look back over the years since the event you're marking, and reflect on how it has helped you progress spiritually. Make this day more special for giving back to the society in the form of donation.
Donation can be one of the best way to remember your departed loved ones, Shastras of Sanatan Dharm also instruct donating on specific tithis help the departed souls a lot.