.header--dates {
    width: 100%;
    display: flex;
    position: relative;
    z-index: 1000;
    background: #fff;
}
.header--dates ul {
    display: block; 
    list-style: none;
    flex-direction: row;
    margin: 0;
    padding: 0;
    width: 100%;
}
.header--dates ul li {
    display: flex;
    flex: 1 1 auto;
    align-content: center;
    justify-content: center;
}

.header--dates ul li {
    border: 2px solid #213261; /* Darker blue */
    color: #213261; /* Darker blue */
}
.header--dates ul li:nth-child(odd):hover a {
    background: #213261; /* Darker blue */
    border-color: #213261;
    color: #ffffff;
}
.header--dates ul li:nth-child(even):hover{
    border-color: #213261;
}
/*.header--dates ul li:nth-child(even) a {
    color: #213261;
}     */
.header--dates ul li:nth-child(even):hover a {
    background: #213261;
    border-color: #213261;
    color: #ffffff;
}
.header--dates a {
    background: transparent;
    color: #213261;
    text-decoration: none;
    text-align: center;
    font-size: 14px;
    display: flex;
    align-content: center;
    justify-content: center;
    flex-direction: column;
    font-family: "Montserrat", sans-serif;
    width: 100%;
    height: 100%;
    padding: 3px 10px !important;
    text-transform: none;
    letter-spacing: inherit;
}

@media screen and (min-width: 768px) {
    .header--dates ul {
        display: flex; 
    }
}
@media screen and (min-width: 1280px) {
    .header--dates.is-fixed {
        position: fixed;
        top: 0
    }
}