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Google on the difficulty of designing a 24-hour time picker - 9to5Google

Google on the difficulty of designing a 24-hour time picker - 9to5Google

Google on the difficulty of designing a 24-hour time picker - 9to5Google
Dec 02, 2022 1 min, 11 secs

The Material Design team has an interesting blog post into what it calls the “24-hour Clock Design Challenge” that chronicles Google’s work creating a time picker for those that use a 24-hour format clock on their Android devices.

The first Material Design 24 hour clock (diagram 1) was released in October 2020 and featured two rings – an inner and outer ring each representing a set of 12 hours to total to the full 24 hours in a day.

Diagram 2 shows a single-ring design that goes from 2 to 24 with only even numbers represented, but odds still accessible and represented by the “space in-between.” (“Upon setting the hour, the clock then switches to a minute mode to set the minutes.”).

After narrowing to “4 optimal designs that capture the spirit of Material 3,” Google conducted two mixed-method research studies with a focus on usability that compared the proposals to the digital input clock design.

Google’s takeaway was that “direct-input digital format” was the easiest time picker for the 24-hour format:.

Since Material has historically offered an analog option still in use by many today, we will move towards the digital input by default for 24hr users while still providing the option for users to enable the 24hr analog (dual-ring) presentation if desired

That means if a user manually switches to the new 24 hour analog clock it will remember that preference the next time the app is opened and will default to it

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