Date field becomes empty when focus is changed
The issue comes up in Tryton 5.0 client when the date field gets out of focus. It is due to an issue in the parser. The date field takes the string in the format - "Thursday 28 February 2019", whereas the code in the Tryton client checks for month as '7' (ref - http://hg.tryton.org/tryton/file/5.0/tryton/common/datetime_.py#l23)