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Updating Daylight Saving Time (DST) on the M150MC4 Time Recorder Follow

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Kristina Hofreiter
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DST begins the second Sunday in March and ends the first Sunday in November. When DST is set, the clock automatically gains one hour at 2:00 AM on the first day of Daylight Saving Time 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.

 

The M150MC4 has two options for DST:

  1. 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.
  2. Manual Updates - If you observe the Daylight Saving 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:

 

Year

DST Begins 2 AM

(2nd Sunday in March)

DST Ends 2 AM

(1st Sunday in November)

2025

 9 March 2 November
2026 8 March 1 November
2027 14 March 7 November
2028 12 March 5 November
2029 11 March 4 November

 

Basic Programming Instructions

To enter the program setting mode, unplug the device and remove the cover. Then make sure the AC cord is plugged into the AC outlet. 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 M150MC4 Time Recorder is set to 1 for the factory default setting; you will want to adjust this setting to manual or turn it off entirely.

Option Description

2

 Off - The clock does not adjust for DST
3 Manual - Set the DST start and end dates yourself

 

No DST Updates

If you wish to turn off the Daylight Saving Time adjustment, 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 on the M150MC4:

  1. Unlock the unit and remove the cover. Refer to our Getting Started article for how to Open the Unit.
  2. Press SELECT until the arrow An arrow icon. points to DST.

    A graphic of the time clock display showing the arrow icon pointing toward DST, the number 1 is surrounded by lines indicating blinking.

  3. Press CHANGE until 2 is displayed.
  4. Press SET to accept this setting.
  5. 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 on the M150MC4:

  1. Unlock the unit and remove the cover. Refer to our Getting Started article for how to Open the Unit.
  2. Press SELECT until the arrow An arrow icon. points to DST.

    A graphic of the time clock display showing the arrow icon pointing toward DST, the number 1 is surrounded by lines indicating blinking.

  3. Press CHANGE until 3 is displayed.
  4. Press SET to accept this setting and change the Starting Date Year. The flashing "Year" indicates the year can be changed.

    A graphic of the time clock display showing the arrow icon pointing toward DST START, the first set of digits, 08, is surrounded by lines indicating blinking, and labeled Year. The second set of digits is indicated with 2 dashes and labeled Month. The third set is also indicated with dashes and labeled Date.

 

To set the DST Start date on the M150MC4:

  1. Press SELECT until the arrow points to DST Start. The flashing digit indicates "Year".
  2. Press CHANGE to set the current year if necessary.
  3. Press SET. The flashing will change from "Year" to "Month".

    A graphic of the time clock display. The second set of digits, 08, is surrounded by lines indicating blinking.

  4. Press CHANGE to set the month to the desired starting month. The standard month in the USA for DST start is 3 (March).
  5. Press SET. The flashing will change from "Month" to "Date". 

    A graphic of the time clock display. The third set of digits surrounded by lines indicating blinking.

  6. Press CHANGE to set the date to the DST start date. The standard date in the USA is the second Sunday in March.
  7. Press SET. The starting date of the display will change from flashing to steady and the arrow will point to "SU".

    A graphic of the time clock display showing the arrow icon pointing to SU. The third set of digits is surrounded by lines indicating blinking.

 

To set the DST End date on the M150MC4:

  1. Press SELECT until the arrow points to DST End. The flashing digit indicates year.

    A graphic of the time clock display showing the arrow icon pointing toward DST END. The first set of digits, 08, is surrounded by lines indicating blinking, and labeled Year. The second set of digits is indicated with 2 dashes and labeled Month. The third set is also indicated with dashes and labeled Date.

  2. Press CHANGE if necessary to set the current year. 
  3. Press SET. The flashing will change from "Year" to "Month".

    A graphic of the time clock display. The second set of digits surrounded by lines indicating blinking.

  4. Press CHANGE to set the month to the desired ending month. The standard month in the USA for DST end is 11 (November).
  5. Press SET. The flashing will change from "Month" to "Date".

    A graphic of the time clock display. The third set of digits surrounded by lines indicating blinking.

  6. Press CHANGE to set the date to the desired DST end date. The standard ending date in the USA for DST is the first Sunday in November.
  7. Press SET. The ending date of the display will change from flashing to steady and the upward pointing arrow mark will be under SU.

    A graphic of the time clock display showing the arrow icon pointing toward SU and DST END. The third set of digits surrounded by lines indicating blinking.

  8. Press SET until the unit returns to normal operation mode.
  9. Replace the cover and lock the unit. Refer to our Getting Started article for how to Close the Unit.

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