Calc Start and End Times

[FJCC]

Without seeing your data, I can only guess. The first place I would look is the output of ymd_hms(). You are reading in an Excel file and Excel will silently change the format of dates. The imported dates may not match the ymd format. If the problem is not there, please post a Reproducible Example with data showing the problem.

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…