From Documentation



An edit box for holding a date. After click on the calender, a calender will pop-up for inputting date.

Keyboard Navigation datebox

  • Alt+DOWN to pop up the calendar.
  • LEFT, RIGHT, UP and DOWN to change the selected day from the calendar.
  • ENTER to activate the selection by copying the selected day to the datebox control.
  • Alt+UP or ESC to give up the selection and close the calendar.


Since 5.0.3 You can customize the rendering of the calendar at the client by JavaScript code that overrides Renderer.


ZKComRef Datebox Example.PNG

 <datebox lenient="true" buttonVisible="false" />
 <datebox lenient="false" buttonVisible="true" />

Integrate Moment.js

Since 8.5.1 The JavaScript widgets including Datebox,Timebox,Timepicker rely on moment.js and moment-timezone.js to handle time zone information more accurately.

To check the included moment.js version, enter in the browser developer console tab.

Properties and Features


You can specify the date range to accept by the constraint property with one or multiple following values:

  • no empty
  • no future
  • no past
  • no today.

It also supports an interval of dates. For example,

<datebox constraint="between 20071225 and 20071203"/>
<datebox constraint="before 20071225"/>
<datebox constraint="after 20071225"/>


  1. The format of the date in the constraint must be yyyMMdd. It is independent of the locale.
  2. The date specified in the above constraints (before/after/between) is included. For example, "before 20071225" includes December 25, 2007 and any day before it, and "after 20110305" includes March 5, 2011 and any day after it.
  3. The constraint is actually represented with an instance of the org.zkoss.zul.SimpleDateConstraint class. You can retrieve the parsed beginning and ending date with the getBeginDate and getEndDate methods.

Multiple Constraints

To specify two or more constraints, use a comma to separate them as follows:

<datebox constraint="no past,no empty"/>

Custom Error Message

If you prefer to display a different message from the default one, you can append the error message to the constraint with a colon.

<datebox constraint="no empty, no future: now or never"/>


  • The error message, if specified, must be the last element and start with a colon.
  • To support multiple languages, you could use the 「l」 function as depicted in the Internationalization chapter.
<datebox constraint="no empty, no future: ${c:l('')}"/>

Displayed Time Zones

The image below shows the new Datebox functionality which allows the user to change the time zone to other predefined time zones. Viewing the zul markup provided below the image we can see that the displayedTimeZones is set to "GMT+12,GMT+8". These options are specified by the developer and restrict the user to the available time zones.

ZKComRef Datebox Timezone.png

<datebox id="datebox1" format="M/d/yy KK:mm:ss a" width="150px" displayedTimeZones="GMT+12,GMT+8" timeZone="GMT+8" timeZonesReadonly="false"/>


You are able to format the field by providing specifying the attribute with a formatting string. The default value is null. When the formatting of the datebox is null, it means the date will be outputted using the format yyyy/MM/dd.

<datebox format="MM/dd/yyyy"/>

Like any other properties, you are able to change the format dynamically, as depicted below.

<datebox id="db"/>
<button label="set MM-dd-yyyy" onClick='db.setFormat("MM-dd-yyyy")'/>

Length Option

Since 5.0.7

In addition to specifying the format explicitly, you could specify the length option. It supports four different length options mentioned at java.text.DateFormat:

  • short
  • medium
  • long
  • full

For example, you could specify the styling rather than the real format as follows.

<datebox format="short"/>
<datebox format="long"/>

Then the real format of the datebox will be decided at run-time depending on the configuration. For more information, please refer to ZK Developer's Reference: Date and Time Formatting.

In addition, you could specify the format for both date and time by using the syntax:


For example,

<datebox format="medium+full"/>


Because Java default locale provider changes since JDK 9, the built-in formats (e.g. long) for some locales might change since JDK 9. We recommend you to use a fixed format pattern.


If a user's input doesn't match the specified format, a Datebox will show an error message. It's a client-side validation.


Default: depends on the current locale (i.e., Locales.getCurrent()) at run-time

You can enforce the locale for an individual component such as:

<datebox locale="de-DE" format="full"/>
<datebox locale="fr" format="full"/>

Multiple-Eras Calendar

Since 9.6.0 Datebox can display some multiple-eras calendar systems including:

  • ROC(Taiwan): locale="zh-TW-u-ca-roc"
  • Japan: locale="ja-JP-u-ca-japanese"
  • Buddhist: locale="th-TH-u-ca-buddhist"

Roc-calendar.jpg Jp-calendar.jpg Buddhist-calendar.jpg

See complete locale list.

Reference: Era


Since 8.0.3

By default, the popup position is set to after_start, for other possible popup positions please refer to Popup#Position.

The First Day of the Week

The first day of the week is decided by the locale by default. (actually the return value of the getFirstDayOfWeek method in the java.util.Calendar).

Since 5.0.3 You can control the first day of the week by the use of the session attribute and the library property. Please refer to The First Day of the Week for details.


Since 8.6.2

You can control the 2DigitYearStart by the use of the library property, org.zkoss.web.preferred.2DigitYearStart.

Show Week Number

  • Available for ZK:
  • ee.png

Since 6.5.0

Datebox supports to show a week number of the year in a calendar.

ZKComRef Datebox Week Of Year.PNG

<datebox weekOfYear="true" />

Show Link of Today

Datebox supports a link to jump back to the date of today quickly

Since 8.0.0

ZKComRef Datebox Link Of Today.PNG

<datebox id="db" showTodayLink="true" ></datebox>

The format is the same with that specified on format attribute

Show Timebox

By default, there is no Timebox in the popup Calendar. If the specified format attribute contains a time format (like below), it will show a Timebox at the bottom of the popup Calendar.

<datebox format="yyyy-MM-dd HH:mm"/>

Monthly / yearly option

Since 9.5.1

Default: day

You can specify the selectLevel attribute to restrict the date granularity users can select. For example, you can limit users to just select a month, it doesn't show the day view to users to choose a day.

Available values are:

  • year
  • month
  • day.
<datebox format="yyyy" selectLevel="year"/>

Close Popup OnTimezoneChange

Since 9.6.0

Datebox supports switching whether to auto close the datebox popup after changing the timezone.


<datebox closePopupOnTimezoneChange="false" displayedTimeZones="GMT+12,GMT+8" timeZone="GMT+8" timeZonesReadonly="false"/>

Inherited Functions

Please refer to FormatInputElement for inherited functions.

Supported Events

Event Type
Event: Event

Denotes the time zone of the component is changed by user.

Supported Molds

Available molds of a component are defined in lang.xml embedded in zul.jar.

Datebox mold default.png
Datebox mold rounded.png

Since 5.0.0

Supported Children

Event Type
None None

Use Cases

Version Description Example Location

Version History

Last Update : 2023/09/18

Version Date Content
5.0.3 July, 2010 An application can control the first day of the week by use of the session attribute and the library property. Please refer to The First Day of the Week for details.
5.0.4 August, 2010 Calendar supports moving to next/prev mon by mouse scrolling.
5.0.7 April, 2011 Datebox.setFormat(String) supported the styling.
5.0.7 April, 2011 Datebox.setLocale(Locale) was introduced.
6.5.0 June, 2012 ZK-1175: Calendar support show week number
9.5.1 October 2020 ZK-3289: Monthly / yearly options for datebox.

Last Update : 2023/09/18

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.