Cook the elbow macaroni according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large bowl, whisk together the mayonnaise, apple cider vinegar, Dijon mustard, sugar, salt, and black pepper until smooth.
Add the cooled macaroni, celery, red onion, bell pepper, peas, parsley, and chopped hard-boiled eggs to the bowl.
Gently fold all the ingredients together until well combined.
Cover the bowl with plastic wrap and refrigerate for at least 1 hour to allow the flavors to meld.
Serve chilled and enjoy!