It's from the physical issue. The publication date on magazines is usually between one week and one month behind the actual release date. I'm not really sure why, but most magazines do this.
That happened because every publication wanted to have an edge over the others. So some monthly mags started sending their february issue to the stores in january 28th, and the others looked "late", being the one "01" issue in a see of "02"s, scheduling future issues a bit earlier to retaliate. Now they're all nearly a month early.