Happy Birthday! or other written sentiment
or [Celebration emoticon]
or [Typical Birthday Gif]
or [Platform-provided Birthday Image with ribbons and confetti]
You've seen 'em, or used them. I like getting a "happy birthday" message on my birthday and I like handing them out on other people's birthday. It's a nice way to say I value you and I'm thinking of you. But, after years of socializing on social media, it feels a little rote.
When I have some down time I draw a birthday cartoon. If I have a chunk of time, I might draw two. Then I number them and scan them in. So far this year, I've done 24 and it has given me a renewed sense of gratification and delight, like handing out treats on Halloween.