Invalid isoformat string when Month < 10

[stefancrain]

Error

Traceback (most recent call last):
  File "/usr/bin/holiday_exporter.py", line 55, in <module>
    if date.fromisoformat(isodate) == date.today():
ValueError: Invalid isoformat string: '2020-1-01'

Using included yaml config (problem line)

...
  - date: "{YYYY}-{MM}-01"
    description: "Some event that repeats every month at specific day"

Isodate expects {MM} but now.month only gives us 1 causing the failure above.

 isodate = custom_holiday['date'].upper().format(YYYY=now.year, MM=now.month)

[allangood]

Thank you for bring this issue!
I'm working in the fix and it will be available soon.

[allangood]

This bug is addressed on #3
Thank you very much for your collaboration!