• In Jain Dharma, there is no universal or fixed “Griha Pravesh” (house entry) ritual or muhurat that is prescribed for all Jains. Griha Pravesh is primarily a Hindu ritual, and Jain households may or may not perform a house-entry ceremony based on family traditions, local customs, or personal choice, rather than a canonical Jain rule.
• There is no specific Jain astrology or tithi/nakshatra guideline that universally approves or forbids entering a new home on a given date like 15 December 2025. If a Jain family wishes to do a house-entry ceremony, they typically consult their family practices or a trusted pandit for any local, culturally inspired timings, rather than a Jain-dharma standard.
• What Jains commonly emphasize is moral and spiritual conduct in new beginnings (like gratitude, ahimsa, and peace in the new home), rather than performing a prescribed Jain ritual at a particular muhurat.
• If you are asking about traditions among Digambar and Śvetāmbara communities: there is no distinct, sect-wide Jain rule that mandates or rejects a griha pravesh date. Both traditions would generally treat any house-entry rite as a family or local custom rather than a formal Jain practice.
• Practical steps you can consider:

- Check with your family’s usual priest or elder about any local griha pravesh customs you follow. - If you want a Jain-centric blessing, you can perform a simple or periodic puja at your derasar or home shrine seeking calm and positive auspices for the new residence, aligned with your personal devotion.

If you’d like, I can help you find specific Jain guidance on related house-related practices (like setting up a derasar at home) from trusted Jain sources.