Maybe? Here's one that works for me in Dendron. I added it to my

global-snippets.code-snippets

file:

"today's date": {
    "prefix": "@td",
    "scope": "markdown,yaml,json",
    "description": "Add today's date in YYYY-MM-DD format",
    "body": [
        "$CURRENT_YEAR-$CURRENT_MONTH-$CURRENT_DATE",
    ],
    }