Change the default dateFomat on Tracker settings panel and then check these trackers in the preview mode. Only the one fit dateFomat settings will get rendered.
searchType: tag
searchTarget: weight
folder: diary
startDate: 2021-01-01
endDate: 2021-01-05
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow
searchType: tag
searchTarget: weight
folder: diary
startDate: 1-20210101
endDate: 5-20210105
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow
searchType: tag
searchTarget: weight
folder: diary
startDate: 2021-01-01-Friday
endDate: 2021-01-05-Tuesday
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow
searchType: tag
searchTarget: weight
folder: diary
startDate: 01-01-2021
endDate: 05-01-2021
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow
searchType: tag
searchTarget: weight
folder: diary
dateFormatPrefix: D-
startDate: D-20210101
endDate: D-20210105
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow
searchType: tag
searchTarget: weight
folder: diary
dateFormatSuffix: -D
startDate: 20210101-D
endDate: 20210105-D
line:
title: Weight Log
yAxisLabel: Weight
yAxisUnit: kg
lineColor: yellow