visit https://intelligentsystemslaboratory.github.io/academic_countdown/ Before committing a new entry in data.json you can test the validity of your date string here: http://www.w3schools.com/js/tryit.asp?filename=tryjs_date_new_string Example of date in the form YYYY/MM/DD for Anywhere on Earth 2025/03/20 23:59 UTC-12 Other sources of conference deadlines https://aideadlin.es/?sub=ML,DM,RO,SP,CV,NLP