You’ve pointed out a real contradiction, and you’re right to question it.

There are two different ways people often talk about “30 days”:

1. Fixed date‑to‑date period

- Example: 1st January to 30th January - This is a specific calendar window. - Once these dates are fixed, you always measure only within this range.

1. Rolling 30‑day period (any 30 continuous days)

- Example: “last 30 days from today” - If today is 18th January, this means 20th December–18th January. - Tomorrow, the same “last 30 days” would become 21st December–19th January. - The window keeps moving with the current date.

If earlier I said “30 day period” without being clear, it may have sounded like I meant the rolling method. Later, when I said “follow date to date”, that clearly means a fixed calendar range (like 1st to 30th of a month).

So to be consistent, you must choose one method and stick to it:

• If your rule or niyam is based on a vow taken for a fixed time (e.g., “from 1st Feb to 1st March I will do this sādhanā”), then you should follow date‑to‑date.
• If your rule is “I always look at my last 30 days of behavior,” that is a rolling 30‑day system.

The mistake was mixing these two ideas. For your practice, pick either:

• “From this specific date to this specific date,” or
• “Any continuous 30 days counted from today.”

Then follow only that definition.