Noida - help with what to do on late MIL’s birthday

Hello guys, We live in Noida. My late Mother-in-law’s bday is 5 days - Feb 21. She passed away in March last year so this will be her first bday after passing away. My husband is going to be super sad and I cannot see him like that. Please give me ideas on what to do on her bday. Donation etc? She was a teacher and a biggggg Hanuman ji bhakt. I know I can never replace her with anything materialistic in the world but please help Lots of love ♥️