Index - Y
| Year | Data.Time.Calendar.OrdinalDate, Data.Time.Calendar.Julian, Data.Time.Calendar.WeekDate, Data.Time.Calendar, Data.Time | 
| YearDay | Data.Time.Calendar.OrdinalDate | 
| yearFormat | Data.Time.Format.ISO8601 | 
| YearMonth | Data.Time.Calendar.Month | 
| YearMonthDay | Data.Time.Calendar, Data.Time | 
| yearMonthFormat | Data.Time.Format.ISO8601 | 
| YearQuarter | Data.Time.Calendar.Quarter | 
| YearWeekDay | Data.Time.Calendar.WeekDate | 
| yearWeekFormat | Data.Time.Format.ISO8601 | 
| Yellow | System.Console.Terminfo.Color, System.Console.Terminfo | 
| yellow | Text.XHtml.Transitional, Text.XHtml | 
| YHC | Distribution.Compiler, Distribution.Simple.Compiler, Distribution.Simple | 
| Yield | Data.Text.Internal.Fusion.Types, Data.Text.Internal.Fusion | 
| yield | GHC.Conc.Sync, GHC.Conc, Control.Concurrent | 
| yield# | |
| 1 (Function) | GHC.Base, GHC.Exts, GHC.Prim | 
| 2 (Function) | GHC.PrimopWrappers | 
| Yield1 | Data.ByteString.Builder.Internal | 
| YPL_1_0 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| YPL_1_1 | Distribution.SPDX.LicenseId, Distribution.SPDX |