Sort:  

Go to: https://etherscan.io/address/xyz
(where xyz is your wallet address) - search for the eth transaction you sent to EOSCrowdSale. See the age column that shows "days ago" that this was sent. For example "4 days ago"
Now go to: https://eosscan.io/ and see what period we're currently at. If its say, 291, then using above example, subtract 4 from the current period and that should be your claim day (or either side of it)

Coin Marketplace

STEEM 0.18
TRX 0.15
JST 0.029
BTC 63193.07
ETH 2456.90
USDT 1.00
SBD 2.67