diff --git a/march-2026/3-19-march-madness/march_madness.js b/march-2026/3-19-march-madness/march_madness.js
new file mode 100644
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+++ b/march-2026/3-19-march-madness/march_madness.js
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+// March Madness 🏀
+// shercodes
+
+function upsetProbability(matchups) {
+  // Defines the array for upset.
+  let upset = [];
+
+  for (let i = 0; i < matchups.length; i++) {
+    let match = matchups[i];
+  
+    // Determines the higher seed (seedA) and lower seed (seedB).
+    const seedA = match[1];
+    const seedB = match[3];
+    
+    // Calculates the upset probability for each matchup.
+    const prob = seedA / (seedA + seedB);
+    const result = Number(prob.toFixed(2));
+    upset.push(result);
+  }
+  
+  return upset;
+};
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diff --git a/march-2026/3-20-cherry-blossoms/cherry_blossoms.js b/march-2026/3-20-cherry-blossoms/cherry_blossoms.js
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+++ b/march-2026/3-20-cherry-blossoms/cherry_blossoms.js
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+// Cherry Blossoms 🌸
+// shercodes
+
+function cherryBlossoms(temps) {
+  // Defines the variable for bloomDay.
+  let bloomDay = -1; // -1 when there's no bloom day.
+
+  for (let i = 4; i < temps.length; i++) {
+    
+    // Adds the current number plus the 4 before it.
+    let sum = 0;
+    for (let j = i - 4; j <= i; j++) {
+      sum += temps[j];
+    }
+
+    // Calculates the 5-day average. 
+    let avg = sum / 5;
+
+    // Compares if the average is greater or equal to 15.
+    if (avg >= 15) {
+      bloomDay = i + 1; // i + 1 when there's a bloom day.
+      return bloomDay;
+    }
+  }
+
+  return bloomDay;
+};
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