Nityārādhanam — The Unbroken Daily Rhythm of Service
Nityārādhanam (Sanskrit: nitya = daily, constant, eternal + ārādhanam = worship, adoration, making the deity pleased; 'daily/eternal worship') is the comprehensive term for the prescribed routine of daily worship performed consistently, day after day without break, as a sacred duty (nitya-karma). In Viśiṣṭādvaita theology, nityārādhanam is not optional devotional practice but a non-negotiable obligation of a qualified devotee — it is the daily renewal of the fundamental relationship between the śeṣa (servant, jīva) and the śeṣin (the master, Bhagavān). The word nitya carries both meanings: 'daily' (recurring each day) and 'eternal' (ever-present, never to be stopped). This double meaning is intentional: daily worship, performed without interruption, mirrors and participates in the eternal, unceasing adoration of Bhagavān in Vaikuṇṭha by the nitya-sūris (eternally liberated souls).
In major Śrī Vaiṣṇava temples, the nitya-pūjā is structured as multiple sessions throughout the day, beginning before dawn and concluding near midnight. The traditional sessions are: Tiruvāṉandal (Palliyezhuchi — awakening service, pre-dawn), Kāla-śeṣam (morning service), Ucchikāla-śeṣam (noon service), Sāyaṃkāla-śeṣam (evening service), and Ardha-jāma-pūjā or Aṭpaṭi (midnight service). Each session includes the full complement of rites: sacred bathing (tirumanjanam), alaṅkāra (adornment), ṣoḍaśopacāra (sixteen offerings), naivedyam (food offering), and ārati (waving of lamps). This unbroken sequence through the day models Bhagavān's own eternal existence — He is served at every hour, never left without attention.
For the Śrī Vaiṣṇava householder, the equivalent daily practice is Thiruvarādhanam — performed each morning after ritual purity, following the Pāñcarātra prescriptions adapted for the home setting. The Āchārya tradition, especially Piḷḷai Lokācārya in Śrī Vachana Bhūṣaṇam and Maṇavāḷa Māmunigaḷ in his commentaries, teaches that performing Thiruvarādhanam daily without failure is the hallmark of a sincere prapanna (surrendered soul). Nityārādhanam is distinguished from utsava-pūjā (festival worship) which is occasional and celebratory — nityārādhanam is the steady, daily ocean of devotion from which the occasional wave of festival rises and returns.