Do you mean your data for Timeline filte is sourced from 2 Excel worksheers?
- From the perspective of Excel, it is recommended to check the date format. As I do not have the environment with SSIS, I could not do the tests for your, if there is any settings related to date dimension, I suggest you check whether you have set it correctly.
We need to avoid removing the timeline because Excel cannot recognize the date field.
- Please also ensure there are no blanks in your column of dates.
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