Extend "AggregateWindow" function for "offset"

[hexxone]

Proposal:
The InfluxDb Docs talk about a offset parameter being available in the "aggregateWindow" function.
Right here:

https://docs.influxdata.com/flux/v0.x/stdlib/universe/aggregatewindow/#downsample-by-calendar-week-starting-on-monday

Which I would like to use for proper week aggregation, but it seems currently not possible?
Sorry if I have missed something.

Current behavior:
When querying Data for "This week" or 1w on every , it always starts from Thursdays.

Desired behavior:
It should be possible to pass any (TimeSpan?) offsets into the aggregateWindow function.

Alternatives considered:
I considered writing this part of the Query by hand, but since I was verry happy with InfluxDB.Client.Linq until now, I would only take it as a last resort.

Use case:
If you want to have a stats Display (say for your solar roof setup at home), showing the data from 1 year in weeks, it does not make much sense for the week to "start" on a thursday.