Month localization in Thymeleaf

I am writing a spring boot application using Thymeleaf as template engine.

Need to localize month translation of displayed date into Ukrainian:

Expected result 10-квітня-2021 18:58:53 is displayed after switching the language

In general localization (EN/UA) works fine.

I tried the following tips, but dates are still displayed in English after switching the language (i.e. 10-April-2021 18:58:53):

 <table class="table table-bordered table-striped ">
                <thead class="thead-dark">
                <tr>
                  ...
        
                    <th></th>
                </tr>
                </thead>
        
                <tbody>
                <tr th:each="tempReport : ${page}">
                    
                   ...
        
                    <td th:text="${#temporals.format(T(java.time.LocalDate).of(#dates.year(tempReport.reportDate),
        #dates.month(tempReport.reportDate), #dates.day(tempReport.reportDate)), 'dd-MMMM-yyyy', new java.util.Locale('ua', 'UA'))}"></td>
        
                </tr>
                </tbody>
    </table>

and this

 ...
<td th:text="${T(org.thymeleaf.util.DateUtils).monthName(#dates.createNow(), #locale)}"></td>
    ...

Also tried this code, and it works

...
        <td th:text="${T(org.thymeleaf.util.DateUtils).monthName(#dates.createNow(), #locale.GERMAN)}"></td>
...

but the problem is there is NO UKRAINIAN constant for this approach, like #locale.UKRAINIAN

My date in POJO class:

@Column(name = "report_date")
    @Temporal(TemporalType.DATE)
    @DateTimeFormat(pattern = "dd/MM/yyyy")
    @NotNull
    private Date reportDate;

Any help to resolve the issue will be appreciated!