Short answer: No. Shwetambar followers generally do observe fasting windows tied to the day, often breaking fast after sunrise (Navkarsi about 48 minutes after sunrise) and finishing eating before sunset. There are variations by local sangh, and some days follow stricter rules. Digambar practice is more strict about water and the exact parana timing, but many Shwetambar likewise follow a sunrise-to-sunrise style for some vows.

• Shwetambar nuance: parna (breaking the fast) after sunrise, with Navkarsi timing common; many meals are completed before sunset, though exact timings can vary by local guidance. You can read more here
• Digambar nuance: often stricter about water and may have different parana windows; some vows are kept only within daytime hours. You can read more here