end date less one day than grid info

Gantt
#1

I obtained some information from the backend like [{end_date=2024-09-06 23:59:59, dur=7, parent=0, name=需求分析, id=1, resid=null, open=true,start_date=2024-08-31],but But On the right side, one day less in time，According to your statement, if it is from August 31st to September 6th, it should be set to September 7th, but according to the requirements, we need to set the end time to September 6th.How can I solve this problem?

Task Bar shows one day less
#2

Hello,
Gantt uses the non-inclusive duration. There is no way to change how Gantt works, but you can change what is displayed to the users by using the templates:
https://docs.dhtmlx.com/gantt/desktop__loading.html#taskenddatedisplayampinclusiveenddates
https://docs.dhtmlx.com/gantt/api__gantt_task_end_date_template.html

Here is an example of how it works:
https://snippet.dhtmlx.com/ici6m0dp

Also, you can set the duration_unit to ‘hour’ and enable the work_time parameter:
https://docs.dhtmlx.com/gantt/api__gantt_duration_unit_config.html
https://docs.dhtmlx.com/gantt/api__gantt_work_time_config.html

Gantt will show the same dates in the grid because the hours will be different.
To show the duration in days and even in fractional values, you can use the formatters:
https://docs.dhtmlx.com/gantt/desktop__formatters_ext.html#durationformatter

Here is an example with the date input type in the inline editors:
https://snippet.dhtmlx.com/w5hrv69x

Here we need to modify the dates because the input element with the date type doesn’t have the hour values.

Here is another example with the datetime-local input type in the inline editors:
https://snippet.dhtmlx.com/gjrgzm0p

The input element may take more space, but it will store the dates more accurately.