leilukin-site/src/_includes/main/hero.njk

<header class="hero">
    <div class="hero__top-bar"></div>
    <div class="hero__img">
        <img src="/assets/leilukin/Leilukins-Hub-website-banner.png" alt="Banner of Leilukin's Hub">
    </div>
</header>

<style>
    .hero {
        width: 100%;
        background-color: var(--clr-hero-bg);
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .hero__top-bar {
        background-color: var(--clr-navbar-bg);
        width: 100%;
        padding: 0.5em 0;
    }

    .hero__img {
        display: grid;
        place-content: center;
    }

    .hero img {
        object-fit: scale-down;
        overflow: hidden;
        filter: drop-shadow(0.1rem 0.1rem 0.2rem black);
    }
</style>

<script defer>
    const hero = document.querySelector(".hero");
    const todayEvent = getTodayEvent();
    const headerTopBarEl = document.querySelector(".hero__top-bar");
    const headerImgEl = document.querySelector(".hero__img");

    if (todayEvent != "No event") {
        if (todayEvent == "Leilukin's Birthday" || todayEvent == "Leilukin's Hub Anniversary") {
            headerTopBarEl.innerHTML = getBlurbHtml(todayEvent);
        } else {
            headerImgEl.classList.add(getBanner(todayEvent));
            headerTopBarEl.innerHTML = getBlurbHtml(todayEvent);
        }
    }

    function getTodayEvent() {
        const date = new Date();
        const month = date.getMonth() + 1;
        const day = date.getDate();

        if (month == 3 && day == 1)
            return "Zero Discrimination Day";
        else if (month == 3 && day == 31)
            return "Trans Day of Visibility";
        else if (month == 4 && day == 6)
            return "International Asexuality Day";
        else if (month == 4 && day == 26)
            return "Lesbian Visibility Day";
        else if (month == 5 && day == 17)
            return "IDAHOBIT";
        else if (month == 5 && day == 19)
            return "Agender Pride Day";
        else if (month == 5 && day == 25)
            return "Pansexual and Panromantic Awareness & Visibility Day";
        else if (month == 6)
            return "Pride Month";
        else if (month == 7 && day == 14)
            return "Non-Binary People's Day";
        else if (month == 7 && day == 28)
            return "Leilukin's Birthday";
        else if (month == 9 && day == 11)
            return "Leilukin's Hub Anniversary";
        else if (month == 9 && day == 23)
            return "Bi Visibility Day";
        else if (month == 10 && day == 8)
            return "International Lesbian Day";
        else if (month == 10 && day == 11)
            return "National Coming Out Day";
        else if (month == 10 && day == 26)
            return "Intersex Awareness Day";
        else
            return "No event";
    }

    function getBanner(day) {
        switch (day) {
            case "Zero Discrimination Day":
                return "flag-progress-intersex";
                break;
            case "Trans Day of Visibility":
                return "flag-trans";
                break;
            case "International Asexuality Day":
                return "flag-ace";
                break;
            case "Lesbian Visibility Day":
                return "flag-lesbian";
                break;
            case "IDAHOBIT":
                return "flag-progress";
                break;
            case "Agender Pride Day":
                return "flag-agender";
                break;
            case "Pansexual and Panromantic Awareness & Visibility Day":
                return "flag-pan";
                break;
            case "Pride Month":
                return "flag-progress-intersex";
                break;
            case "Non-Binary People's Day":
                return "flag-non-binary";
                break;
            case "Bi Visibility Day":
                return "flag-bi";
                break;
            case "International Lesbian Day":
                return "flag-lesbian";
                break;
            case "National Coming Out Day":
                return "flag-rainbow";
                break;
            case "Intersex Awareness Day":
                return "flag-intersex";
                break;
            default:
                return "";
        }
    }

    function getBlurbHtml(day) {
        switch (day) {
            case "Zero Discrimination Day":
                return `
                    Today is <a href="https://www.unaids.org/en/zero-discrimination-day" target="_blank">Zero Discrimination Day</a>
                `;
                break;
            case "Trans Day of Visibility":
                return `
                    Today is <a href="https://www.manygendersonevoice.org/tdov.html" target="_blank">Trans Day of Visibility</a>
                `;
                break;
            case "International Asexuality Day":
                return `
                    Today is <a href="https://internationalasexualityday.org/en" target="_blank">International Asexuality Day</a>
                `;
                break;
            case "Lesbian Visibility Day":
                return `
                    Today is <a href="https://www.lesbianvisibilityweek.com" target="_blank">Lesbian Visibility Day</a>
                `;
                break;
            case "IDAHOBIT":
                return `
                    Today is <a href="https://may17.org" target="_blank">International Day Against Homophobia, Biphobia and Transphobia</a></span>
                `;
                break;
            case "Agender Pride Day":
                return `
                    Today is <a href="https://www.believeoutloud.com/voices/article/agender-pride-day/" target="_blank">Agender Pride Day</a></span>
                `;
                break;
            case "Pansexual and Panromantic Awareness & Visibility Day":
                return `
                    Today is <a href="https://genderedintelligence.co.uk/panvisibilityday" target="_blank">Pansexual and Panromantic Visibility Day</a>
                `;
                break;
            case "Pride Month":
                return `
                    Happy <a href="https://www.loc.gov/lgbt-pride-month/about/" target="_blank">Pride Month</a>!
                `;
                break;
            case "Non-Binary People's Day":
                return `
                    Today is <a href="https://www.manygendersonevoice.org/non-binary-peoples-day.html" target="_blank">Non-Binary People's Day</a>
                `;
                break;
            case "Leilukin's Birthday":
                return `
                    Today is Leilukin's birthday
                `;
                break;
            case "Leilukin's Hub Anniversary":
                return `
                    Today is the anniversary of the launch of Leilukin's Hub
                `;
                break;
            case "Bi Visibility Day":
                return `
                    Today is <a href="https://bivisibilityday.com/about" target="_blank">Bi Visibility Day</a>
                `;
                break;
            case "International Lesbian Day":
                return `
                    Today is <a href="https://www.lgbtiqhealth.org.au/international_lesbian_day2" target="_blank">International Lesbian Day</a>
                `;
                break;
            case "National Coming Out Day":
                return `
                    Today is <a href="https://www.hrc.org/resources/national-coming-out-day" target="_blank">National Coming Out Day</a>
                `;
                break;
            case "Intersex Awareness Day":
                return `
                    Today is <a href="https://interactadvocates.org/intersex-awareness-day" target="_blank">Intersex Awareness Day</a>
                `;
                break;
            default:
                return ``;
        }
    }
</script>