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    Things to Do in Philadelphia Tomorrow

    Monday, September 21, 2026 Philadelphia, Pennsylvania 4 events · 0 activities

    Discover 4 things happening in Philadelphia tomorrow (Monday, September 21, 2026) — concerts, festivals, free events, and family-friendly picks.

    Events Tomorrow

    Undertale: The Determination Symphony

    Undertale: The Determination Symphony

    Free
    12:00 AM
    Marian Anderson Hall - Kimmel Center
    Eihwar (21+ Event)

    Eihwar (21+ Event)

    Free
    12:00 AM
    Underground Arts
    Don West

    Don West

    Free
    12:00 AM
    The Foundry
    Liz Phair w/ Sleater-Kinney

    Liz Phair w/ Sleater-Kinney

    Free
    12:00 AM
    Franklin Music Hall