A spokesperson of the messaging platforms said the issue had been resolved shortly after the outage.
WhatsApp is expected to acknowledge the problem in the coming hours and we'll update this article once the service is back up and running.
Users of WhatsApp Messenger from several countries across the globe on Sunday complained of a downtime in the functionality of the social platform hours to the end of 2017.
WhatsApp is down with New Year's revellers around the world reporting outages as they try to message their friends.
The outage began just around the midnight, according to several users on Twitter. This is not surprising as last year the company confirmed that New Year's Eve is its "biggest messaging day" every year.
The website DownDetector.co.uk reported a spike in outage reports around 6pm United Kingdom time. The website, Outage.Report found the largest concentration of outages in portions of England, Germany, and virtually all of the Netherlands, as well as parts of Italy, Spain, and central Europe.