Swimming in February 21?

The Jed announced that there will be swimming on February 21 without any information about what is the departure time or the location. Because of this, Supreme Leader Nanobana Kinako has cleared her schedule for February 21 to avoid the risk of schedule clashes. But Supreme Leader Nanobana Kinako must still complete her 45 consecutive days in order to be eligible for another Stellar Reunion, if she fail to do, the counter resets to 0. Why? Since the location is unknown there's a high chance that there's no WiFi in this swimming, also she must kept her daily 60 primogems received at all days, not doing so may disrupt the primogem collecting even if this is just a 1 day miss.