Unexpected behavior or bug in calendar widget

### What's the point
In calendar widget current year defined with standard function `time.ISOWeak()`. And as written in documentation
```golang
// ISOWeek returns the ISO 8601 year and week number in which t occurs.
// Week ranges from 1 to 53. Jan 01 to Jan 03 of year n might belong to
// week 52 or 53 of year n-1, and Dec 29 to Dec 31 might belong to week 1
// of year n+1.
func (t Time) ISOWeek() (year, week int){}
```
last days of December every year will produce year `n+1` not `n`.

### Thats what i got with date December 30,2024

Do we need to change `time.ISOWeak()` to `time.Now().Date()` or not?

Also i'm resolving conflicts of PR #174 now, which involves calendar events. And the change to `time.Now().Date()` ensure if someone has events during the New Year's holiday, they will see them in the widget.

Happy New Year 🎉🎉🥳