What does the narrator do each day of the week around midnight in The Tell-Tale Heart?

In "The Tell-Tale Heart," the narrator describes how each night, around midnight, he stealthily enters the old man's room. He does this for seven consecutive nights, carefully avoiding detection as he shines a lantern on the old man's eye, which he finds unsettling. On the eighth night, however, the old man awakens in fear, prompting the narrator to commit his horrific act. This nightly ritual underscores the narrator's obsession and descent into madness.