Hey Sonu, March is quite pleasant in Bhutan. You will experience sunny days but it is sure to get chilly as the night falls. I would suggest that you carry light sweaters and jackets. No need to pack super heavy woolens. You may want to carry a fleece sweatshirt if you're heading to the Tiger's Nest though. Coming to the denominations, carrying Rs 100 and Rs 500 notes is a safe bet. Refrain from taking Rs 2000 notes since they are rarely accepted.
Hope this helps! Best, Saumiabee
Hello, Bhutan is quite pleasant in this period. I would suggest to carry full clothes as it will cold and many places have monasteries to visit where clothes above knees are prohibited. Carry woollen clothes also. And in many places you need to walk for long distance, so shoes or floaters are always best to wear, avoid heels.
Also, many of debit cards don't work in Bhutanese ATMs, so carrying cash is always preferred. Carry small amount bills also as the shopkeepers accept Indian currency but they give change in Bhutanese currency.