--- title: Managing time zones --- > Agent instructions: > **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown. > > - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version. > - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt). You can manage time zones in the **Time zones** application, where you can see a list of defined time zones. ## Creating a new time zone To create a new time zone: 1. Open the **Time zones** application. 2. Click **New time zone**. 3. Fill in the properties of the new time zone. - See [Configuring daylight saving time](#configuring-daylight-saving-time) below. 4. Click **Save**. You have created the time zone. Now if you switch back to the time zones list, you should see the new time zone present among the records. ## Time zone properties When defining a new time zone or editing an existing one, you can set the following properties: | Property | Description | | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **Time zone name** | Name of the time zone displayed in the administration interface. | | **Code name** | The unique identifier of the time zone (for example used by developers in code). | | **GMT difference** | Difference in hours between the time zone and Greenwich Mean Time. | | **Use daylight saving time** | If selected, daylight saving time (DST) will be used for this time zone. Values set in the DST start rule and DST end rule properties will be used to define the DST interval. | | **DST starts at** | Based on values set in DST start rule, this field will display the exact time when the time advance will occur. | | **DST ends at** | Based on values set in DST end rule, this field will display the exact time when the time advance will be rolled back. | | DST start rule & DST end rule | Using these properties, you can exactly define when the time advance is carried out. | | **Month** | Month in which the time advance occurs. | | **Condition** | Condition specifying the day that the change occurs on. Based on the selected option, you can select day of the week, day number or a combination of both. | | **Day** | Two fields – day of the week and day number – can be used based on the selected condition. | | **Time** | Exact time of the time advance. | | **Value** | Number of hours that will be added to the current time when the time advance occurs. | ## Configuring daylight saving time When creating a time zone or modifying an existing one, you may need to specify the daylight saving time (DST). This is a convention of setting clocks so that afternoons have more daylight and mornings have less of it. The amount of time advance and dates of change vary from country to country, however, it is usually a one hour advance at the beginning of spring and the advance is rolled back in autumn. For more information about DST, see this article: . You can set the daylight saving time separately for each of the time zones when creating a new time zone or when editing an existing one: 1. Select the **Use daylight saving time** check box. 2. Set the **DST start rule** for the current time zone. 1. Select the month in which the change will be carried out using the **Month** drop-down list. 2. Specify on which day of the selected month the change will be carried out using the **Condition** drop-down list and the two **Day** drop-down lists. | FIRST | Day of the week can be selected. If you select Monday, the time advance will occur on the first Monday of the selected month. | | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | LAST | Day of the week can be selected. If you select Monday, the time advance will occur on the last Monday of the selected month. | | **>=** | Day of the week and day number can be selected. If you select Monday and 15, the time advance will occur on the first Monday after the 15th day of the selected month. | | **<=** | Day of the week and day number can be selected. If you select Monday and 15, the time advance will occur on the last Monday before the 15th day of the selected month. | | **=** | Day number can be selected. If you select 15, the time advance will occur on the 15th of the selected month. | 3. Set the time when the change will occur on the specified date using the **Time** field. 4. Set the time difference between the standard time and DST in the **Value** field. - This value represents the **difference from standard time in hours**. - Use this value (usually _1_) for the **DST start rule** and _0_ for the **DST end rule**. 3. Set the **DST end rule** as specified in the previous step. Set **Value** as _0_. 4. Click **Save**.