In case you still need to set your clocks to the master

[mahatmakanejeeves]

In case you still need to set your clocks to the master https://tycho.usno.navy.mil/simpletime.html

Link to tweet

US Naval Observatory Master Clock Time:
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Time Zones:
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[MontanaMama]

1. The master clock at my house

is Louis the cat who will let me know when it is 4:15 am each and every morning without fail for the last 16 years.

[rurallib]

2. long live Louis!

[JustABozoOnThisBus]

3. When do you switch from Louis Standard Time to Louis Daylight Time?

Or, like Tim Apple's watch, is the switch automatic?

[MontanaMama]

7. Oh my goodness...you know what??

I didn't even think of the time change....Now that you mention it, it must be automatic! I was sleeping on the couch last night because a certain person was snoring in my bedroom and Louis woke me up at 4:15 am meowing his fool head off. How does he do that? We are now on Louis Daylight Time.

[liberaltrucker]

4. Computer clock is 2 seconds slow

Phone is dead on.

[gay texan]

5. Or tune in to radio station WWV

On 2.5, 5, 10, 15, and 20 MHZ

The one and only shortwave radio talking clock brought to you by the fine folks at the NIST (national institute of standards and technology)

All the time, all the time!

[mahatmakanejeeves]

6. One used to be able to call the Naval Observatory on the phone and get the time.

Let's just see....

United States Naval Observatory

The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing (PNT) for the United States Navy and the United States Department of Defense.
....

Time service



Atomic clock ensemble at the U.S. Naval Observatory

The U.S. Naval Observatory operates two Master Clock facilities. The primary facility, in Washington, D.C. maintains 57 HP/Agilent/Symmetricom 5071A-001 high performance cesium atomic clocks and 24 hydrogen masers. The alternate master clock, at Schriever Air Force Base, maintains 12 cesium clocks and 3 masers. The observatory also operates four rubidium atomic fountain clocks, which have a stability reaching 7×10−16. The observatory intends to build several more of this type for use at its two facilities.[30] The clocks used for the USNO timescale are kept in 19 environmental chambers, whose temperatures are kept constant to within 0.1 degree C and whose relative humidities (for all masers and most cesiums) are kept constant to within 1%. The timescale is based only upon the Washington DC clocks. On June 7, 2007, 70 standards were weighted in the timescale computations.[30]

The U.S. Naval Observatory provides public time service via 26 NTP servers on the public Internet, and via telephone voice announcements:

[phone] (Washington, D.C.)
[phone]
[phone] (Colorado Springs)

The voice of actor Fred Covington (1928–1993) has been announcing the USNO time since 1978.

The voice announcements follow the same pattern at both sites. They always begin with the local time (daylight or standard), and include a background of 1-second ticks. Local time announcements are made on the minute, and 15, 30, and 45 seconds after the minute. Coordinated Universal Time (UTC) is announced five seconds after the local time. Upon connecting, only the second-marking ticks are heard for the few seconds before the next scheduled local time announcement

The USNO also operates a modem time service, and provides time to the Global Positioning System.

Is CHU still on the air? I like to get the time in French. It's so much more sophisticated. I used to get them easily at 3.33 MHz.

CHU (radio station)

City: Ottawa, Ontario, Canada
Broadcast area North America, Worldwide
Frequency: 3.33 MHz, 7.85 MHz, 14.67 MHz
First air date: 1923
Format: Time
Language(s): English, French
Power: 3 kW (3.33, 14.67 MHz), 10 kW (7.85 MHz)
Transmitter coordinates 45°17′47″N 75°45′22″W
Former callsigns 9CC (1923-1928), VE9CC (after 1928), VE9OB (until 1938)
Owner: National Research Council of Canada
Website: http://www.nrc-cnrc.gc.ca/eng/services/time/short_wave.html

CHU is the call sign of a shortwave time signal radio station operated by the Institute for National Measurement Standards of the National Research Council of Canada.

[gay texan]

8. CHU

Yes! I hear them above 3.3 mhz at night! The French/English talking clock.

[gay texan]

9. Something else

If they are only pushing 3kW on the 3.3mhz station, then I would say that makes a good test on an antique shortwave radio restoration.