In the past dozen years or so the schedule had been released about 10-14 days prior to the draft. With the draft moved back into May there had been some comments that the schedule would be released later this year, but that isn't the case (if you believe Aiello). In a recent memo - NFL spokesman Greg Aiello said the league has a 'normal target' date of mid-April. Nothing leaked yet, but we should start hearing something in the next week or so.
Previously announced:
Week 1 on Sept. 4: TBA at Seattle
Week 4 on Sept. 28: Dolphins at Raiders in London, 1 p.m. ET
Week 8 on Oct. 26: Lions at Falcons in London, 9:30 a.m. ET
Week 10 on Nov. 9: Cowboys at Jaguars in London, 1 p.m. ET
Week 13 (Thanksgiving Day): AFC at Lions, NFC at Cowboys
Usually, the schedule is released on a Tuesday night, which highlights April 15th and April 22nd as likely mid-April targets for the announcement.