Default headline for DatePicker displays incorrect date on iOS

[j-roskopf]

Describe the bug
When using the DatePicker component with the default headline, the date displayed is incorrect on iOS, but displays fine for me on Android

Affected platforms

• iOS

Versions

• Kotlin version*: 1.9.20
• Compose Multiplatform version*: 1.5.10
• OS version(s)* (required for Desktop and iOS issues): iOS 17.0.1
• OS architecture (x86 or arm64): arm64
• JDK (for desktop issues):

To Reproduce
Steps and/or the code snippet to reproduce the behavior:

1. Declare DatePicker

            val state = rememberDatePickerState()

            DatePicker(
                state = state,
                title = null,
            )

2. Select date
3. Observe headline value

Expected behavior
A clear and concise description of what you expected to happen.
Value should be correct / the same as what displays on Android

Screenshots
If applicable, add screenshots to help explain your problem.

Left is Android and right is iOS

compose_multi.mov

both devices are set to the same time + date

[j-roskopf]

I am also now noticing in the demo video above, the month header for the iOS date picker above the week day headline is labeled as October 2023, but it is November 2023

it seems like both monday + day are off by one

on iOS when the month dropdown is displaying November (above screenshot), it is displaying December, similar to what Android displays for December as well (below screenshot)

[alexzhirkevich]

It was already fixed in JetBrains/compose-multiplatform-core#877 but sadly wasn't landed in latest release

[j-roskopf]

ah gotchya, I'll close the issue. Is there an estimated version it would ship in that I can be on the lookout for?

Thanks!

[MatkovIvan]

This will be included in 1.6.0 (even alpha's)