Incorrect usage of Y ('week-based-year') in date format patterns

[Marcono1234]

Hello,
multiple DateTimeFormatter patterns in this repository use Y. However, that is 'week-based-year'. Maybe they should rather use y ('year-of-era')?
This makes a difference near the end of some years where y is still the current year, but Y is already the next year. See for example https://errorprone.info/bugpattern/MisusedWeekYear or https://rules.sonarsource.com/java/type/Bug/RSPEC-3986 for details.

Affected:

• tilesfx/src/main/java/eu/hansolo/tilesfx/skins/CalendarTileSkin.java

  Line 58 in 578b579

  private static final DateTimeFormatter MONTH_YEAR_FORMATTER = DateTimeFormatter.ofPattern("MMMM YYYY");

• tilesfx/src/main/java/eu/hansolo/tilesfx/skins/ClockTileSkin.java

  Line 66 in 578b579

  dateFormatter = DateTimeFormatter.ofPattern("dd MMM YYYY", tile.getLocale());

• tilesfx/src/main/java/eu/hansolo/tilesfx/skins/ClockTileSkin.java

  Line 193 in 578b579

  dateFormatter = DateTimeFormatter.ofPattern("dd MMM YYYY", tile.getLocale());

• tilesfx/src/main/java/eu/hansolo/tilesfx/skins/DateTileSkin.java

  Line 36 in 578b579

  private static final DateTimeFormatter MONTH_YEAR_FORMATTER = DateTimeFormatter.ofPattern("MMMM YYYY");

• tilesfx/src/main/java/eu/hansolo/tilesfx/skins/TimelineTileSkin.java

  Line 100 in 578b579

  private DateTimeFormatter DTF = DateTimeFormatter.ofPattern("dd.YY HH:mm");

  
  This DTF pattern also looks a bit weird; why include 'day of month' (not 'day of year', D) and 'year' but not 'month'? Is that intended?

• tilesfx/src/main/java/eu/hansolo/tilesfx/tools/Helper.java

  Line 617 in 578b579

  return DateTimeFormatter.ofPattern("MM/dd/YYYY");

• tilesfx/src/main/java/eu/hansolo/tilesfx/tools/Helper.java

  Line 619 in 578b579

  return DateTimeFormatter.ofPattern("YYYY.MM.dd");

• tilesfx/src/main/java/eu/hansolo/tilesfx/tools/Helper.java

  Line 621 in 578b579

  return DateTimeFormatter.ofPattern("dd.MM.getY()YYY");

  
  Important: This pattern also accidentally got corrupted by fb06ab6; it contains getY()