.event_month {
    padding-bottom: 30px;
    margin: 40px 0 60px;
    border-bottom: 1px solid #000;
}
.event_wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    margin: 20px 0;
}
span.event_date {
    display: block;
}
@media (max-width: 768px) {
    .event_wrapper {
        display: grid;
        grid-template-columns: 1fr;
        margin: 20px 0 40px;
    }
    span.event_date {
        display: inline;
    }
    span.event_date:after {
        content: "  ";
    }
}