@startgantt
skinparam handwritten true
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Project starts the 2020-12-01
[Task1] lasts 9 days
sunday are closed
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[Task2] lasts 10 days
[Task2] starts 7 days after [Task1]'s end
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memo2 ...
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explanations2 ...
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-- Separator title --
[M1] happens on 5 days after [Task1]'s end
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@endgantt