app.py

import streamlit as st
from datetime import date

def calculate_age(birth_date):
    today = date.today()
    age = today.year - birth_date.year - (
        (today.month, today.day) < (birth_date.month, birth_date.day)
    )
    return age

def main():
    st.set_page_config(page_title="Age Calculator", page_icon="🎂")
    st.title("🎉 Age Calculator")
    st.markdown("Enter your birthdate to calculate your age.")

    birth_date = st.date_input("Select your birthdate")

    if st.button("Calculate Age"):
        age = calculate_age(birth_date)
        st.success(f"Your age is: **{age}** years")

if __name__ == "__main__":
    main()