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I tried to get the day name from a date, but with the date 27/02/2021 i get Invalid Date

new Date(exam.examDate).toLocaleString('fr-FR', { weekday: 'long' })

i tried to convert the date using datePipe but it return the below error

Unable to convert "27/02/2021" into a date' for pipe 'DatePipe

new Date(this.datePipe.transform(exam.examDate, "dd/MM/yyyy")).toLocaleString('fr-FR', { weekday: 'long' })

I tried to get the day name from a date, but with the date 27/02/2021 i get Invalid Date

new Date(exam.examDate).toLocaleString('fr-FR', { weekday: 'long' })

i tried to convert the date using datePipe but it return the below error

Unable to convert "27/02/2021" into a date' for pipe 'DatePipe

new Date(this.datePipe.transform(exam.examDate, "dd/MM/yyyy")).toLocaleString('fr-FR', { weekday: 'long' })

• javascript
• typescript

Share Improve this question Follow asked Feb 17, 2021 at 20:32 Aymen KanzariAymen Kanzari 2,03399 gold badges5151 silver badges9191 bronze badges

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3 Answers 3

Sorted by: Reset to default 2

This is because Date expects MM/DD/YYYY but you're passing DD/MM/YYYY:

const getDay = date => {
  const parts = date.split('/');
  return new Date(+parts[2], +parts[1] - 1, +parts[0]).toString().split(' ')[0]; 
}

console.log( getDay('27/02/2021') );

Using moment.js:

const getDay = date =>
  moment(date, "DD/MM/YYYY").format('ddd');

console.log( getDay('27/02/2021') );

<script src="https://cdnjs.cloudflare./ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8+M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous"></script>

You can get a custom day name from Date like:

const names = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
const dayName = names[dateObject.getDay()];

const date = '27/02/2021';
const d = date.split('/');
const names = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
const dayName = names[new Date(d[2],d[1],d[0]).getDay()];
console.log(dayName);

examDate = "27/02/2021";
date = examDate.split("/");
x = new Date(date[2], date[1] - 1, date[0]);

// it prints "samedi"
console.log(x.toLocaleString('fr-FR', { weekday: 'long' }));

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