Sure, I'd be happy to weigh in on this topic! I've seen some conflicting information myself, and I think it's important to approach this question with a critical eye.
First of all, let's dispel the notion that daily calibration is necessary for most cyclists. Unless you're a professional athlete competing at the highest level, where minute differences in power output can mean the difference between victory and defeat, daily calibration is likely overkill. In fact, some experts argue that too much calibration can actually throw off your power meter's accuracy over time.
That being said, it's still important to calibrate your power meter regularly to ensure that it's providing accurate data. Monthly calibration is generally sufficient for most cyclists, but you may want to increase the frequency if you're noticing inconsistencies in your power data or if you're making significant changes to your bike setup.
Of course, the specific calibration requirements will depend on the type of power meter you're using. Some power meters are more reliable than others, and some are more sensitive to changes in temperature and other environmental factors. Do your research and make sure you're using a high-quality power meter that's appropriate for your needs.
And finally, don't forget to actually use your power meter during your rides! It's not enough to just calibrate it and then ignore the data. Pay attention to your power output, and use that information to make informed decisions about your training and racing.
So, to sum up, I'd say that monthly calibration is generally sufficient for most cyclists, but you may need to adjust the frequency based on your specific needs and the type of power meter you're using. And most importantly, don't forget to actually use your power meter during your rides!