Looking on the internet deeply has found these results:

In 2019 is the most popular phrase on the web.

On 2019 1114,000,000 results on the web	In 2019 1960,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Sales revenue is forecasted to decrease in 2015 2018 and start growing in 2019. In 2019, the EU Party and Ecuador shall examine the improvement of tariff liberalisation of goods included in staging category "SP1"; Venice is running to be European Culture Capital in 2019 My iCal crashed, and now all my appointments are set in 2019. Kai, tell me what happened in 2019. Further stringent targets will follow in 2019. In 2019, Union Station is attacked.

On 2019

1114,000,000 results on the web

In 2019

1960,000,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Sales revenue is forecasted to decrease in 2015
2018 and start growing in 2019.
In 2019, the EU Party and Ecuador shall examine the improvement of tariff liberalisation of goods included in staging category "SP1";
Venice is running to be European Culture Capital in 2019
My iCal crashed, and now all my appointments are set in 2019.
Kai, tell me what happened in 2019.
Further stringent targets will follow in 2019.
In 2019, Union Station is attacked.