[fix] events time math

[Arc-blroth]

sorry ronak for my bad math

[r2dev2]

Mentioned in discord but not here, but this fails for today of 08/26/23 and compare with 08/21/23.

@Aplet123 wrote a isSameWeek function that passes my tests that i think should replace the current functions

function isSameWeek(d1, d2) {
    const dayMs = 1000 * 60 * 60 * 24;
    const t1 = d1.getTime();
    const t2 = d2.getTime();
    // cannot be more than a week apart
    if (Math.abs(t1 - t2) >= dayMs * 7) {
        return false;
    }
    const day1 = d1.getDay();
    const day2 = d2.getDay();
    // same day of week = return true iff same date
    if (day1 == day2) {
        return d1.getDate() == d2.getDate();
    } else if (day1 < day2) {
        return t1 < t2;
    } else {
        return t1 > t2;
    }
}

[r2dev2]

see comment above

[Arc-blroth]

closing in favor of #79