If in the smart contract there is a deadline of January 20, I think setting the token distribution period in ICO must be set as the time period, so that it is possible to raise the necessary funds. If pre-sale sells only 2,500,000 tokens at the best price, then you can sell 13,500,000 by January 20 at a higher price, it must begin immediately after the pre-sales period. It is unlikely that you sell 13,500,000 tokens in an undetermined start-up period, but after December 27 in the context in which smart-contract January 20 is the deadline. Otherwise I appreciate the idea of the project and sincerely I wish very successful.