Calendar is an input component to pick a datetime.
<style>
    .value {
        font-weight: bold;
    }
</style>
<h:outputScript name="locales/locale-de.js" library="primefaces" target="head"/>
<h:outputScript name="locales/locale-es.js" library="primefaces" target="head"/>
<div class="card">
    <h:form id="form">
        <p:growl id="msgs" showDetail="true" skipDetailIfEqualsSummary="true"/>
        <h:panelGrid columns="2" cellpadding="5">
            <p:outputLabel for="inline" value="Inline:"/>
            <p:calendar id="inline" value="#{calendarView.date1}" mode="inline"/>
            <p:outputLabel for="popup" value="Popup:"/>
            <p:calendar id="popup" value="#{calendarView.date2}"/>
            <p:outputLabel for="button" value="Button:"/>
            <p:calendar id="button" value="#{calendarView.date3}" showOn="button"/>
            <p:outputLabel for="event" value="Select Event:"/>
            <p:calendar id="event" value="#{calendarView.date4}">
                <p:ajax event="dateSelect" listener="#{calendarView.onDateSelect}" update="msgs"/>
            </p:calendar>
            <p:outputLabel for="german" value="German:"/>
            <p:calendar id="german" value="#{calendarView.date5}" locale="de" navigator="true"
                        pattern="yyyy-MMM-dd"/>
            <p:outputLabel for="germanV2" value="German (other Pattern):"/>
            <p:calendar id="germanV2" value="#{calendarView.dateDe}" locale="de" navigator="true"
                        pattern="dd.MM.yyyy"/>
            <p:outputLabel for="restricted" value="Restricted:"/>
            <p:calendar id="restricted" value="#{calendarView.date6}" mindate="#{calendarView.minDate}"
                        maxdate="#{calendarView.maxDate}"/>
            <p:outputLabel for="multi" value="Multiple:"/>
            <p:calendar id="multi" value="#{calendarView.date7}" pages="3"/>
            <p:outputLabel for="effect" value="Effect:"/>
            <p:calendar id="effect" value="#{calendarView.date8}" effect="fold"/>
            <p:outputLabel for="mask" value="Mask:"/>
            <p:calendar id="mask" value="#{calendarView.date9}" pattern="dd-MM-yyyy" mask="true"/>
            <p:outputLabel for="datetime" value="Datetime:"/>
            <p:calendar id="datetime" value="#{calendarView.date10}" pattern="MM/dd/yyyy HH:mm:ss"/>
            <p:outputLabel for="dateTimeDe" value="Datetime (German):"/>
            <p:calendar id="dateTimeDe" value="#{calendarView.dateTimeDe}" locale="de"
                        pattern="dd.MM.yyyy HH:mm"/>
            <p:outputLabel for="time" value="Time Only:"/>
            <p:calendar id="time" value="#{calendarView.date11}" pattern="HH:mm" timeOnly="true"/>
        </h:panelGrid>
        <p:commandButton value="Submit" update="msgs" action="#{calendarView.click}" icon="pi pi-check"/>
        <p:dialog modal="true" resizable="false" header="Values" widgetVar="dlg" showEffect="fold">
            <p:panelGrid id="display" columns="2" columnClasses="label,value">
                <h:outputText value="Inline:"/>
                <h:outputText value="#{calendarView.date1}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Popup:"/>
                <h:outputText value="#{calendarView.date2}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Button:"/>
                <h:outputText value="#{calendarView.date3}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Event:"/>
                <h:outputText value="#{calendarView.date4}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="German:"/>
                <h:outputText value="#{calendarView.date5}">
                    <f:convertDateTime pattern="yyyy-MMM-dd"/>
                </h:outputText>
                <h:outputText value="German (other Pattern):"/>
                <h:outputText value="#{calendarView.date5}">
                    <f:convertDateTime pattern="dd.MM.yyyy"/>
                </h:outputText>
                <h:outputText value="Restricted:"/>
                <h:outputText value="#{calendarView.date6}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Multiple:"/>
                <h:outputText value="#{calendarView.date7}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Effect:"/>
                <h:outputText value="#{calendarView.date8}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Mask:"/>
                <h:outputText value="#{calendarView.date9}">
                    <f:convertDateTime pattern="MM/dd/yyyy"/>
                </h:outputText>
                <h:outputText value="Datetime:"/>
                <h:outputText value="#{calendarView.date10}">
                    <f:convertDateTime pattern="MM/dd/yyyy HH:mm:ss"/>
                </h:outputText>
                <h:outputText value="Datetime (German):"/>
                <h:outputText value="#{calendarView.dateTimeDe}">
                    <f:convertDateTime pattern="dd.MM.yyyy HH:mm"/>
                </h:outputText>
                <h:outputText value="Time Only:"/>
                <h:outputText value="#{calendarView.date11}">
                    <f:convertDateTime pattern="HH:mm"/>
                </h:outputText>
            </p:panelGrid>
        </p:dialog>
    </h:form>
</div>
package org.primefaces.showcase.view.input;
import jakarta.annotation.PostConstruct;
import jakarta.faces.application.FacesMessage;
import jakarta.faces.context.FacesContext;
import jakarta.faces.view.ViewScoped;
import jakarta.inject.Named;
import jakarta.validation.constraints.Future;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;
import io.quarkus.runtime.annotations.RegisterForReflection;
import org.primefaces.PrimeFaces;
import org.primefaces.event.SelectEvent;
@Named
@ViewScoped
@RegisterForReflection(serialization = true)
public class CalendarView implements Serializable {
    private Date date;
    private Date date1;
    @Future
    private Date date2;
    private Date date3;
    private Date date4;
    private Date date5;
    private Date date6;
    private Date date7;
    private Date date8;
    private Date date9;
    private Date dateDe;
    @Future
    private Date date10;
    private Date date11;
    private Date date12;
    private Date date13;
    private Date date14;
    private Date date15;
    private Date date16;
    private Date date17;
    private Date dateTimeDe;
    private Date dateTimeMillis;
    private List<Date> multi;
    private List<Date> range;
    private List<Date> invalidDates;
    private List<Date> validDates;
    private List<Integer> invalidDays;
    private Date minDate;
    private Date maxDate;
    private Date minTime;
    private Date maxTime;
    private Date minDateTime;
    private Date maxDateTime;
    @PostConstruct
    public void init() {
        invalidDates = new ArrayList<>();
        Date today = new Date();
        invalidDates.add(today);
        long oneDay = 24 * 60 * 60 * 1000;
        for (int i = 0; i < 5; i++) {
            invalidDates.add(new Date(invalidDates.get(i).getTime() + oneDay));
        }
        validDates = new ArrayList<>();
        validDates.add(today);
        for (int i = 0; i < 5; i++) {
            validDates.add(new Date(validDates.get(i).getTime() + oneDay));
        }
        invalidDays = new ArrayList<>();
        invalidDays.add(0);
        /* the first day of week is disabled */
        invalidDays.add(3);
        minDate = new Date(today.getTime() - (365 * oneDay));
        maxDate = new Date(today.getTime() + (365 * oneDay));
        Calendar tmp = Calendar.getInstance();
        tmp.set(Calendar.HOUR_OF_DAY, 9);
        tmp.set(Calendar.MINUTE, 0);
        tmp.set(Calendar.SECOND, 0);
        tmp.set(Calendar.MILLISECOND, 0);
        minTime = tmp.getTime();
        tmp = Calendar.getInstance();
        tmp.set(Calendar.HOUR_OF_DAY, 17);
        tmp.set(Calendar.MINUTE, 0);
        tmp.set(Calendar.SECOND, 0);
        tmp.set(Calendar.MILLISECOND, 0);
        maxTime = tmp.getTime();
        minDateTime = new Date(today.getTime() - (7 * oneDay));
        maxDateTime = new Date(today.getTime() + (7 * oneDay));
        dateDe = GregorianCalendar.getInstance().getTime();
        dateTimeDe = GregorianCalendar.getInstance().getTime();
        dateTimeMillis = GregorianCalendar.getInstance().getTime();
    }
    public void onDateSelect(SelectEvent<Date> event) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
        facesContext.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Date Selected", format.format(event.getObject())));
    }
    public void click() {
        PrimeFaces.current().ajax().update("form:display");
        PrimeFaces.current().executeScript("PF('dlg').show()");
    }
    public Date getDate() {
        return date;
    }
    public void setDate(Date date) {
        this.date = date;
    }
    public Date getDate1() {
        return date1;
    }
    public void setDate1(Date date1) {
        this.date1 = date1;
    }
    public Date getDate2() {
        return date2;
    }
    public void setDate2(Date date2) {
        this.date2 = date2;
    }
    public Date getDate3() {
        return date3;
    }
    public void setDate3(Date date3) {
        this.date3 = date3;
    }
    public Date getDate4() {
        return date4;
    }
    public void setDate4(Date date4) {
        this.date4 = date4;
    }
    public Date getDate5() {
        return date5;
    }
    public void setDate5(Date date5) {
        this.date5 = date5;
    }
    public Date getDate6() {
        return date6;
    }
    public void setDate6(Date date6) {
        this.date6 = date6;
    }
    public Date getDate7() {
        return date7;
    }
    public void setDate7(Date date7) {
        this.date7 = date7;
    }
    public Date getDate8() {
        return date8;
    }
    public void setDate8(Date date8) {
        this.date8 = date8;
    }
    public Date getDate9() {
        return date9;
    }
    public void setDate9(Date date9) {
        this.date9 = date9;
    }
    public Date getDate10() {
        return date10;
    }
    public void setDate10(Date date10) {
        this.date10 = date10;
    }
    public Date getDate11() {
        return date11;
    }
    public void setDate11(Date date11) {
        this.date11 = date11;
    }
    public Date getDate12() {
        return date12;
    }
    public void setDate12(Date date12) {
        this.date12 = date12;
    }
    public Date getDate13() {
        return date13;
    }
    public void setDate13(Date date13) {
        this.date13 = date13;
    }
    public Date getDate14() {
        return date14;
    }
    public void setDate14(Date date14) {
        this.date14 = date14;
    }
    public Date getDate17() {
        return date17;
    }
    public void setDate17(Date date17) {
        this.date17 = date17;
    }
    public List<Date> getMulti() {
        return multi;
    }
    public void setMulti(List<Date> multi) {
        this.multi = multi;
    }
    public List<Date> getRange() {
        return range;
    }
    public void setRange(List<Date> range) {
        this.range = range;
    }
    public List<Date> getInvalidDates() {
        return invalidDates;
    }
    public void setInvalidDates(List<Date> invalidDates) {
        this.invalidDates = invalidDates;
    }
    public List<Date> getValidDates() {
        return validDates;
    }
    public void setValidDates(List<Date> validDates) {
        this.validDates = validDates;
    }
    public List<Integer> getInvalidDays() {
        return invalidDays;
    }
    public void setInvalidDays(List<Integer> invalidDays) {
        this.invalidDays = invalidDays;
    }
    public Date getMinDate() {
        return minDate;
    }
    public void setMinDate(Date minDate) {
        this.minDate = minDate;
    }
    public Date getMaxDate() {
        return maxDate;
    }
    public void setMaxDate(Date maxDate) {
        this.maxDate = maxDate;
    }
    public Date getDateTimeDe() {
        return dateTimeDe;
    }
    public void setDateTimeDe(Date dateTimeDe) {
        this.dateTimeDe = dateTimeDe;
    }
    public Date getDateDe() {
        return dateDe;
    }
    public void setDateDe(Date dateDe) {
        this.dateDe = dateDe;
    }
    public Date getDateTimeMillis() {
        return dateTimeMillis;
    }
    public void setDateTimeMillis(Date dateTimeMillis) {
        this.dateTimeMillis = dateTimeMillis;
    }
    public Date getDate15() {
        return date15;
    }
    public void setDate15(Date date15) {
        this.date15 = date15;
    }
    public Date getMinTime() {
        return minTime;
    }
    public void setMinTime(Date minTime) {
        this.minTime = minTime;
    }
    public Date getMaxTime() {
        return maxTime;
    }
    public void setMaxTime(Date maxTime) {
        this.maxTime = maxTime;
    }
    public Date getDate16() {
        return date16;
    }
    public void setDate16(Date date16) {
        this.date16 = date16;
    }
    public Date getMinDateTime() {
        return minDateTime;
    }
    public void setMinDateTime(Date minDateTime) {
        this.minDateTime = minDateTime;
    }
    public Date getMaxDateTime() {
        return maxDateTime;
    }
    public void setMaxDateTime(Date maxDateTime) {
        this.maxDateTime = maxDateTime;
    }
}