added a test suite for DrRacket that checks to make sure the Dear Dr

starts up on all of the days that have easter eggs (well, except 7/2,
since that one is hard to interpose on and hasn't changed in a long
time)

original commit: 617df05ef7d43c04cfaf6978c52619e1865a4812

collects/framework/private/bday.rkt

@@ -1,34 +1,6 @@
 #lang s-exp framework/private/decode
-
-      TY+9Ds
-      IwDIT3P
-      MWN9hCJA
-          hIwAA
-           +CGN
-           rGFR
-            UkRW
-            lA4u
-            1JaF
-             K6ne
-            /zz1n
-            R0w/v
-           3gis73R
-           j6s8Zto
-           jxn oU0
-          k2Cl yEjX
-          OwFR cmBh
-         mBVA  Dwmg
-         i6lD   RKO0
-         gzOj   Pk1l
-        +/Je    XNDZ
-        Zr6m     iThT
-       OwM6      glKb
-       toML      NyTJ
-       sPz3       05XJ
-      jZd4        kaCE
-      iot+        UbDD
-     ZhUb          Cp/f
-     yLxa          YX1Y
-     8vnh          zCug
-    WvD5            +7J/C
-    +wj/            \wI=;;
+bZFPT8MwDMXv/RRPOzmHSCsgAQeGEOsNAVp3QxzaxR0VJEVJNolvT5Kl3fiT04t/z45jF/Rp
+h32vGNp2slXN1y30KNx7FtwehCgKUtz1hkEUI9BQQhQAfbAHvajGB+R4Mxjl5CJdA/1xstUF
+F2jLns0es+eH9XJV3dXralVX90+Py3omXsXv1JDcd4iZf0miztvebOXC7HTLNjn/KZKsm521
+bLzMzYpw8oPUGAW6AcX2pR6Mf0OUAloc4/H3h6iKucfJjMMKhdKIcInzeTCMfBpv5uUcZ9en
+fFpE5iVQnvBpK2P9C+Aq8G8=

collects/framework/splash.rkt

@@ -240,7 +240,10 @@
   (set! splash-load-handler (λ (old-load f expected) (old-load f expected))))
 
 (define funny?
-  (let ([date (seconds->date (current-seconds))])
+  (let ([date (seconds->date (let ([ssec (getenv "PLTDREASTERSECONDS")])
+                               (if ssec
+                                   (string->number ssec)
+                                   (current-seconds))))])
     (and (with-handlers ([exn:fail:filesystem? (λ (x) #f)])
            (collection-path "icons")
            #t)