Make the Ides of March a holiday on which slime molds are Caesar salads

Yes, I know the Ides of March was yesterday, and I also know Caesar
salads have nothing to do with Julius Caesar. But I think enough
people will find the connection funny to add this in.

Author: copperwater

doc/xnh-changelog-10.0.md

@@ -22,6 +22,8 @@ changes:
 
 ### Gameplay changes
 
+- The Ides of March (March 15th) is recognized as one of the in-game holidays,
+  and slime molds will generate as "Caesar salads" on that day.
 
 ### Interface changes
 

include/hack.h

@@ -1493,6 +1493,7 @@ typedef uint32_t mmflags_nht;     /* makemon MM_ flags */
 #define HOLIDAY_LOS_MUERTOS    0x08000
 #define HOLIDAY_MARDI_GRAS     0x10000
 #define HOLIDAY_GROUNDHOG_DAY  0x20000
+#define HOLIDAY_IDES_OF_MARCH  0x40000
 
 /* message flags for dump_container() */
 #define DUMPCONT_NORMAL 0x0

src/calendar.c

@@ -324,6 +324,9 @@ current_holidays(void)
     if (month == 3 && date == 14) {
         retmask |= HOLIDAY_PI_DAY;
     }
+    if (month == 3 && date == 15) {
+        retmask |= HOLIDAY_IDES_OF_MARCH;
+    }
     if (month == 4 && date == 1) {
         retmask |= HOLIDAY_APRIL_FOOLS;
     }

src/cmd.c

@@ -5473,6 +5473,8 @@ doholidays(void)
         putstr(win, 0, "Valentine's Day");
     if (holidays & HOLIDAY_PI_DAY)
         putstr(win, 0, "Pi Day");
+    if (holidays & HOLIDAY_PI_DAY)
+        putstr(win, 0, "The Ides of March");
     if (holidays & HOLIDAY_APRIL_FOOLS)
         putstr(win, 0, "April Fools' Day");
     if (holidays & HOLIDAY_EASTER)

src/mkobj.c

@@ -912,6 +912,9 @@ maybe_festive_fruit(void)
         foods[idx++] = "irrational pie";
         foods[idx++] = "perfectly circular pie";
     }
+    if (holiday & HOLIDAY_IDES_OF_MARCH) {
+        foods[idx++] = "Caesar salad";
+    }
     if (holiday & HOLIDAY_EASTER) {
         foods[idx++] = "easter egg";
         foods[idx++] = "chocolate bunny";