A useful starting point
Several containers can look similar while holding different components prepared at different times. A short label helps identify them and connect them with the preparation record. The date alone does not establish that the food remains appropriate to eat.
Keep it in your kitchen notes
Use a clear contents label and preparation date, and retain the relevant storage instructions. Keep foods under the conditions required for them. Do not turn a handwritten label into a universal shelf-life rule. Follow current official guidance for the category and preparation involved. The label is one part of an organised process, not a substitute for correct handling.