Certificate expiration data wrongly mentioned

My domain is:

I received email notification from the Expiry Bot saying that my certificate for the above domain will get expire on 26-02-2021.
However the certificate for the above mentioned domain is valid until 26-02-2022.
Can you check what is wrong here? Am I wrong thinking that my certificate is still valid until 26-02-2022 or is there something wrong with Expiry Bot?

The platform my web server runs on is (include version): Ubuntu

My hosting provider is: Amazon

I can login to a root shell on my machine (yes or no, or I don't know): yes

If you take a look at https://crt.sh/?Identity=aitahub.com&deduplicate=Y, things might be a bit clearer.

You issued certificates from different providers:

  1. One from Let's Encrypt, which has a lifetime of 3 months (from November 2020 to February 2021)
  2. A few from Amazon, which have a lifetime of 13 months (from December 2020 to January 2022)

The email from Let's Encrypt is reminding you about certificate #1, which is indeed expiring.

If you have chosen to use Amazon CA rather than Let's Encrypt, then you can just disregard the email. Let's Encrypt doesn't know that you have chosen to use Amazon instead.

If, on the other hand, you are using both Let's Encrypt and Amazon CA certificates simultaneously, then you need to heed the reminder email and renew the Let's Encrypt certificate before it expires.