Deprecation warning: node process.js - moment construction falls back to js Date()

[schlos]

imamopravoznati-stats % npm start

> foie-graphs@0.0.2 start /Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats
> node process.js

Deprecation warning: value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are discouraged and will be removed in an upcoming major release. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.
Arguments: 
[0] _isAMomentObject: true, _isUTC: false, _useUTC: false, _l: undefined, _i: Tue Jan 01 2019 00:00:00 GMT+0100 (Central European Standard Time), _f: undefined, _strict: undefined, _locale: [object Object]
Error
    at Function.createFromInputFallback (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:320:98)
    at configFromString (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2385:15)
    at configFromInput (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2611:13)
    at prepareConfig (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2594:13)
    at createFromConfig (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2561:44)
    at createLocalOrUTC (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2648:16)
    at createLocal (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:2652:16)
    at hooks (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/node_modules/moment/moment.js:12:29)
    at Store.getOptions (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/lib/store.js:77:15)
    at Object.<anonymous> (/Users/miroslav/CodeForCroatia/Workspace CFC/imamopravoznati-stats/process.js:18:53)
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