Create app.py

app.py

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+# app.py
+import streamlit as st
+from datetime import date, datetime
+
+# Page settings
+st.set_page_config(page_title="Age Calculator", page_icon="🎂", layout="centered")
+
+# Title
+st.title("🎂 Age Calculator")
+st.markdown("Enter your birthdate below to calculate your current age.")
+
+# Input
+birth_date = st.date_input("📅 Select your birthdate", min_value=date(1900, 1, 1), max_value=date.today())
+
+# Button
+if st.button("Calculate Age"):
+    today = date.today()
+    
+    # Age in years
+    age_years = today.year - birth_date.year - (
+        (today.month, today.day) < (birth_date.month, birth_date.day)
+    )
+
+    # Age in months and days
+    delta = today - birth_date
+    age_days = delta.days
+    age_months = age_days // 30
+
+    # Output
+    st.success(f"🎉 You are **{age_years} years** old.")
+    st.info(f"📆 That's approximately **{age_months} months** or **{age_days} days** old.")
+
+    # Birthday message
+    if today.month == birth_date.month and today.day == birth_date.day:
+        st.balloons()
+        st.markdown("🎈 **Happy Birthday!** 🎁🎉")
+
+# Footer
+st.markdown("---")
+st.markdown("Made with ❤️ using Streamlit")