Spotify doesn’t have a date yet.
From a recent Spotify earnings call (Q2 2018), the CEO of Spotify says:
Obviously it’s the big markets like Russia, India that probably will contribute the most. I don’t have any further comment on any specific launch dates on those things.
They have already set up an office in Mumbai last year and appointed the former OLX CEO Amarjit Singh Batra as Spotify India’s head. But the launch had hit music label resistance. Considering the current challenges, Spotify may be launching in October or November this year.
UPDATE — 1 November 2018
Spotify CEO Daniel Ek (Q3 2018):
India specifically is a very fragmented marketplace, with lots of different local labels, lots of different local publishers. Whenever we deal with licensing situations, it’s very hard for us to predict accurate timelines on the basis of multiple partnerships — just the sheer scale of number of partnerships makes it very hard to predict that, but there’s nothing that we see that prevents us from launching in India.
UPDATE — 26 NOVEMBER 2018
[…]Variety has learned that a launch in India is expected as soon as the next six months and will offer an extended free trial period — longer than the 30 days of full-access[…].
UPDATE — 27 NOVEMBER 2018
Spotify Technology SA is preparing to introduce its service as soon as the first quarter of 2019, said the people, who asked not to be identified because the information isn’t yet public. Variety previously reported on the agreements, saying Spotify will launch in India within six months.
The first quarter of 2019 — sometime before March.
UPDATE — 15 JANUARY 2019
Spotify, which has been gearing up to launch in India for several years, could do so as soon as January 31, sources tell Variety.
While industry insiders say the streaming giant has not yet locked down deals for the country with the three major-label groups — Sony, Universal and Warner — it is possible that Spotify could launch in India without them: Those companies are not as big in India as they are in many other countries, and Monday morning’s announcement that Spotify has inked a content deal with T-Series, the country’s leading music and film company, ensures that it will be rolling out with plenty of popular content.
UPDATE — 18 JANUARY 2019
Spotify has accidentally confirmed an India launch date of 31st January on its Terms & Conditions page for India.