How to convert english date to islamic.

[osmmosa]

I want to convert 01 FEB 2020 to Islamic(Hijri) like 07-06-1441 and its event like السبت

[MenoData]

Following code should satisfy your requirements:

        // immutable so can be static final
        ChronoFormatter<PlainDate> parser =
            ChronoFormatter.ofDatePattern(
                "dd MMM uuuu", PatternType.CLDR, Locale.ENGLISH)
                // ignores uppercase versus lower case
                .with(Attributes.PARSE_CASE_INSENSITIVE, true);

        // immutable so can be static final
        ChronoFormatter<HijriCalendar> formatter =
            ChronoFormatter.ofPattern(
                "dd-MM-yyyy, EEEE", 
                PatternType.CLDR, 
                new Locale("ar", "EG"), // Egypt as country? If not then change the country.
                HijriCalendar.family())
                // enforces ordinary arabic digits 0-9 
                // otherwise the country in locale will determine it
                .with(Attributes.NUMBER_SYSTEM, NumberSystem.ARABIC);

        String input = "01 FEB 2020";
        PlainDate gregorian = parser.parse(input);
        // if you want the calendar of Saudi-Arabia then specify the variant Ummalqura
        HijriCalendar hijri = 
          gregorian.transform(HijriCalendar.family(), HijriCalendar.VARIANT_UMALQURA);
        String output = formatter.print(hijri);
        System.out.println(output); // 07-06-1441, السبت

Note: According to Google translator, the Arabic word "السبت" means "Saturday" in English, so I suggest the pattern symbols "EEEE" indicating the day-of-week (4 letters for full name).