Changing time from military to standard

It has always been Military time.

https://www.manualslib.com/manual/2073018/Delonghi-Com53-Series.html?page=7#manual

and from DeLonghi direct

The clock on my BCO combination machine is military time. How can I change it? All BCO's units are designed with a military standard and it is not possible to change it.https://www.delonghi.com/en-us/faqs/search?q=%20Delonghi%20COM530m%20military%20time..

Tell Alexa to change to 'Standard Time'

Say "Change to 24-Hour clock" or use the Alexa app.

1. Open the Alexa app .
2. Select Devices .
3. Go to Echo & Alexa, or to All Devices.
4. Select your Echo Dot with clock device. This opens device settings.
5. Under General, select LED Display.
6. Turn 24-Hour Clock on or off.

Change the Time Format on Your Echo Dot with clock

https://www.amazon.com > help > customer > display
Why is my echo showing military time?"
How do I change Alexa to standard time?
Here's how you do it.

1. Swipe down from the top.
2. Tap the Settings cog.
3. Scroll down and choose Device Options.
4. Tap Date & Time.
5. Click Time Zone and choose yours.

..

you have it set on 24 hour time instead of 12 hour time
it will change over at midnight to military time as that is when the 24 hour period ( military time ) starts

Have a look at the manual


Download Center Download Software Firmware Drivers Manuals Samsung

The manual is available at Bose.com and page 17-18 shows the detail.

To set AM/PM (12 hour) or Military (24 hour) time - Press the On/Off button once to turn your Wave radio off.

Press and hold Clock Set, and then press On/Off to switch between AM/PM (12 HR) or military (24 HR) formats

only displays military time

This is controlled by hardwired switch (12/24) OR digitally during menu setup sequence.

Disable the "Automatic update" feature and set the clock manually.
To do this go to Menu, settings, initial setup, time and date, Autoupdate>Off, then set the clock and date.

To set AM/PM (12 hour) or Military (24 hour) time - With the system off, hold
down Alarm Setup and press On/Off to switch between AM/PM (12 hour) and Military
(24 hour) time formats.

With the sytem off, hold down the Alarm Setup button and the On/Off button to switch between 12 hour (AM/PM) and 24 hour (Military) time. If you need the manual go to
http://www.bose.com/controller?event=VIEW_STATIC_PAGE_EVENT&url=/customer_service/owners/guides/music_system.jsp