Example day-of-week string indexing is off-by-one in many repos

[mew-cx]

In examples/ds1307_simpletest.py, the list of strings used to expand the integer time.struct_time.tm_wday value appears to defined using the C convention (Sunday=0), rather than the Python convention (Monday=0); see https://docs.python.org/3/library/time.html#time.struct_time

A quick search reveals this error in several other repos:

• https://github.com/adafruit/Adafruit_CircuitPython_PCF8563/blob/main/examples/pcf8563_simpletest.py#L24
• https://github.com/adafruit/Adafruit_CircuitPython_PCF8523/blob/main/examples/pcf8523_simpletest.py#L17
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Pulse_Oximeter_Logger/code.py#L46
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/blahaj/code.py#L22
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Disconnected_CO2_Data_Logger/code.py#L23
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Pulse_Oximeter_Logger/code.py#L46
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/Daily_Cheer_Automaton/CircuitPython/code.py#L121
• https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/MagTag_Google_Sheets/weekly_planner/code.py#L25
• perhaps others?

[FoamyGuy]

For now I think we can leave this one open until we take care of the rest of the instances in this list, or create separate issues on those repos

[tekktrik]

I think it may be worth creating new ones just so they live with the repos, though the Learn Guides would live together anyway, I can handle creating them (and tackling them likely)

[FoamyGuy]

@tekktrik okay, sounds good. I'm working on the change for the PCF ones now.

[mew-cx]

Yeah, figured I'd leave it to yall to decide how best to distribute the issues among repos. Thanks for taking it over

[tekktrik]

Looks like we're all good now! Thanks y'all!