diff --git a/Userland/cal.cpp b/Userland/cal.cpp
new file mode 100644
index 0000000000..da14021e22
--- /dev/null
+++ b/Userland/cal.cpp
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+
+int day_of_week(int day, int month, int year)
+{
+    static const int seek_table[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
+    if (month < 3)
+        --year;
+
+    return (year + year / 4 - year / 100 + year / 400 + seek_table[month - 1] + day) % 7;
+}
+
+int get_number_of_days(int month, int year)
+{
+    bool is_leap_year = ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0));
+    bool is_long_month = (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12);
+
+    if (month == 2)
+        return is_leap_year ? 29 : 28;
+
+    return is_long_month ? 31 : 30;
+}
+
+int main(int argc, char** argv)
+{
+    (void)argc;
+    (void)argv;
+
+    time_t now = time(nullptr);
+    auto* tm = localtime(&now);
+    int target_day = tm->tm_mday;
+    int target_month = tm->tm_mon + 1;
+    int target_year = tm->tm_year + 1900;
+    int target_day_of_week = day_of_week(1, target_month, target_year);
+
+    printf("     %02u - %04u    \n", target_month, target_year);
+    printf("Su Mo Tu We Th Fr Sa\n");
+
+    for (int i = 1; i <= get_number_of_days(target_month, target_year); ++i) {
+        if (i < target_day_of_week) {
+            printf("  ");
+        } else {
+            printf(i != target_day ? "%2d" : "\x1b[30;47m%2d\x1b[0m", i);
+        }
+
+        printf(i % 7 == 0 ? "\n" : " ");
+    }
+    printf("\n\n");
+}