During a "Quiet Period" coaches may not watch players compete live or visit high schools. Coaches are allowed to write and call players, however, face-to-face contact is only allowed on the college's campus.
Many programs will host "Junior Days" during quiet periods to get perspective student athletes on campus.
Use the quiet period as an opportunity to reach out and request unoffficial or official visits because you know coaches will be on campus.
The 2016-17 NCAA D-I baseball recruiting calendar has two "Quiet Periods". The first quiet period is only about three weeks from the middle of August through the first week in September. The second quiet period begins after the early signing period in November and lasts all winter until the end of February (with an exception for the January dead period). The quiet period is shown in "Yellow" (see images below).
The NCAA D-II "Other Sports" recruiting calendar (which includes baseball and softball) only recognizes contact and dead periods. There are no quiet periods for D-II baseball and softball.
D-III, NAIA, and NJCAA recruiting calendars do not recognize quiet periods.
You can find more on recruiting periods at the NCAA website: http://www.ncaa.org/student-athletes/resources/recruiting-calendars
For an actual "wall calendar" presentation go to http://on.ncaa.com/2l3Vccg and click on the correct Division, Sport, & Year.