DST begins the second Sunday in March and ends the first Sunday in November. When DST is set, at 2:00 AM on the first day of Daylight Saving Time, the clock automatically gains one hour to show 3:00 AM. At 2:00 AM on the last day of DST, the clock automatically loses one hour to show 1:00 AM.

Note: Previous versions of this model included a feature for automatic synchronization using the atomic signal, facilitated by an attached antenna. Mentions of these features are indicated with a red asterisk (*).

The ES900 has three (3) basic options for DST:

*Automatic Updates - If your clock is receiving atomic signals and you observe the U.S. standard Daylight Saving Time change, you will want to use this option.
No DST Updates - If you do not want the clock to update for DST, you will want to use this option to turn off the Daylight Saving Time adjustment entirely.
Manual Updates - If you observe the Daylight Savings Time change and do not fall into the automatic updates category, you can manually set the DST start and end dates.

This article will cover all three options, but feel free to use the links below to jump to the option that fits your needs.

In this article:

Basic Programming Instructions
Function of Control Buttons
Setting Daylight Saving Time
DST Mode Options
*Automatic Updates
No DST Updates
Manual Updates
How to set DST to Manual
How to manually set the DST Start date
How to manually set the DST End date

Basic Programming Instructions

To enter the program setting mode, make sure the AC cord is plugged into the AC outlet and remove the over. Next press SELECT once. The recorder will change to the program mode showing the upward pointing arrow on the display positioned under the TIME mark.

Function of Control Buttons

Control	Function
SELECT	Press SELECT to choose the desired program setting mode. The selected program setting is indicated by the upward pointing arrow on the display.
CHANGE	Press CHANGE to cycle through the options.
SET	Press SET to set the option. Press the SET button again to return the Time Recorder to the normal operation mode.

Setting Daylight Saving Time

DST Mode Options

The ES900 Time Recorder is set to automatic for the factory default setting; if you do not have an atomic model, you will want to adjust this setting to manual or turn it off entirely.

Daylight Savings Options

Option	Description
*1	*Automatic - DST is automatically set from the atomic clock signal
2	Off - The clock does not adjust for DST
3	Manual - Set the DST start and end dates yourself

*Automatic Updates (Default Setting)

If your clock is receiving atomic signals and you observe the U.S. standard Daylight Saving Time change, simply leave the clock’s DST mode set to the default of 1. The clock will automatically adjust for DST on the second Sunday of March and the first Sunday of November every year based on the NIST WWBV Signal.

In this event, no further setting is necessary for Daylight Saving Time. The clock will handle the change automatically.

No DST Updates

If you wish to turn off the Daylight Saving Time adjustment entirely, you will need to select option 2 for the clock’s DST mode. If you do this, the clock will NOT adjust at all for Daylight Saving Time.

To turn off the DST adjustment, follow these steps:

Unlock the unit and remove the cover. Refer to our Getting Started article for how to Open the Unit.
Press SELECT until the arrow points to DST near the top right of the display.
Press CHANGE until the number 2 is displayed.
Press SET to accept this setting.
Replace the cover and lock the unit. Refer to our Getting Started article for how to Close the Unit.

Manual Updates

To set the DST start and end dates manually, you will need to set the clock’s DST mode to option 3. You must set the DST start and end dates manually. The unit will remember the start and end dates you set, and automatically update the settings every year thereafter. No further manual setting is necessary unless you need to change your DST schedule.

To set DST Mode to manual, follow these steps:

Unlock the unit and remove the cover. Refer to our Getting Started article for how to Open the Unit.
Press SELECT until the arrow points to DST.
Press CHANGE until the Mode number displays 3.
Press SET to accept this setting and change the Starting Date Year. The flashing "Year" indicates the year can be changed.
You must set the DST start and end dates manually.

To manually set the DST Start date, follow these steps:

Push CHANGE if necessary to set the current year.
Press SET. The flashing will change from "Year" to "Month".
Push CHANGE to set the month to the desired starting month. The standard month in the USA for DST start is 3 - March.
Push SET. The flashing will change from "Month" to "Date".
Push CHANGE to set the date to the desired DST start date. The standard date in the USA for DST start is the second Sunday in March.
Push SET. The starting date of the display will change from flashing to steady and the upward pointing arrow mark will be under SU.

To manually set the DTS End date, follow these steps:

Press SELECT until you see the DST End mark.
Push CHANGE if necessary to set the current year.
Press SET. The flashing will change from "Year" to "Month".
Push CHANGE to set the month to the desired ending month. The standard month in the USA for DST end is 11 - November.
Push SET. The flashing will change from "Month" to "Date".
Push CHANGE to set the date to the desired DST start date. The standard date in the USA for DST end is the first Sunday in November.
Push SET. The ending date of the display will change from flashing to steady and the upward pointing arrow mark will be under SU.
Push SET again as necessary until the display returns to the current time. Printing will not occur unless the confirmation step is completed.
Replace the cover and lock the unit. Refer to our Getting Started article for how to Close the Unit.