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Friday, October 26, 2018

Data Technical News #2018 - 29
Daylight Savings Time Ends Soon

Markets Impacted:

  • All markets

Products Impacted:

  • All Nasdaq and UTP Data Feeds

Contact Information:

What you need to know:

Nasdaq would like to remind its trading participants and direct data feed subscribers that Daylight Savings Time will be ending soon.

In the United States (U.S.), Daylight Savings Time will end on Sunday, November 4, 2018, at 2:00 a.m. ET.

In the European Union, Daylight Savings Time will end on Sunday, October 28, 2018, at 1:00 a.m. GMT.

When will Daylight Savings Time end in 2018?

In the U.S., Daylight Savings Time is scheduled to end on the first Sunday in November. In 2018, U.S. clocks should revert to Standard Time on Sunday, November 4, 2018, at 2:00 a.m. ET.

In the European Union, Daylight Savings Time, or Summer Time, ends on the last Sunday in October. In 2018, European clocks should revert to Standard Time on Sunday, October 28, 2018, at 1:00 a.m. GMT.

When should my firm adjust system clocks for Daylight Savings Time?

For the Nasdaq U.S.-based products, firms should adjust their system clocks to reflect daylight savings time before the start of trading on Monday, November 5, 2018.

For the Nasdaq European-based products, firms should adjust their system clocks to reflect the time change before the start of trading on Monday, October 29, 2018.

How will the different start and end dates for Daylight Savings Time impact the Nasdaq products with international data?


Nasdaq Index Products

On the Nasdaq Global Index Data Service (GIDS), the European index values are calculated during Nasdaq Nordic market hours and the U.S. index values are calculated during The Nasdaq Stock Market (Nasdaq) hours. Nasdaq Nordic markets follow Central European Time standard and Nasdaq follows U.S. Eastern Time. Due to the different start and end dates for Daylight Savings Time in the U.S. and Europe, Nasdaq distributors will see a one-hour difference in the GIDS transmission schedule for three weeks in the spring and one week in the fall this year.

Nasdaq Fixed Income

With the change to U.S. Daylight Time, the Nasdaq Fixed Income trading session will open at 6:30 p.m. ET/11:30 p.m. GMT and close at 5:35 p.m. ET/10:35 p.m. GMT (next day).

Where can I find the market hours for each of Nasdaq's markets?

Nasdaq posts its system hours on the individual market websites. For convenience, hyperlinks to the trading schedules are listed below:

Where can I find additional information?

For more information, contact Nasdaq Global Information Services at +1 301 978 5307 or +45 33 93 33 66.


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