Well, the parameter of a Timer is of type Duration:

  A Duration represents the elapsed time between two instants as an int64 nanosecond count. The representation limits the largest representable duration to approximately 290 years.

Which is not really good because we have to calculate the time between now() and Saturday. If "wall time" changes, the scheduler will not be triggered when expected.

In that case I would not rely on Timer to use it in a cron-like fashion, or trigger a Ticker every second, check the _current_ wall time, and decide if anything needs to be done.

You can read more about Timers, Tickers and Sleeps in this (pretty interesting) article[1]

[1] https://blog.gopheracademy.com/advent-2016/go-timers/