diff --git a/lib/compiler/aro/aro/Compilation.zig b/lib/compiler/aro/aro/Compilation.zig
index 21d6823253..d361f42c90 100644
--- a/lib/compiler/aro/aro/Compilation.zig
+++ b/lib/compiler/aro/aro/Compilation.zig
@@ -217,7 +217,6 @@ fn generateDateAndTime(w: anytype, timestamp: u47) !void {
     });
 
     const day_names = [_][]const u8{ "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
-    // days since Thu Oct 1 1970
     const day_name = day_names[@intCast((epoch_day.day + 3) % 7)];
     try w.print("#define __TIMESTAMP__ \"{s} {s} {d: >2} {d:0>2}:{d:0>2}:{d:0>2} {d}\"\n", .{
         day_name,
diff --git a/lib/std/time/epoch.zig b/lib/std/time/epoch.zig
index 631fa178e4..b409d3e9eb 100644
--- a/lib/std/time/epoch.zig
+++ b/lib/std/time/epoch.zig
@@ -133,7 +133,7 @@ pub const MonthAndDay = struct {
     day_index: u5, // days into the month (0 to 30)
 };
 
-// days since epoch Oct 1, 1970
+/// days since epoch Jan 1, 1970
 pub const EpochDay = struct {
     day: u47, // u47 = u64 - u17 (because day = sec(u64) / secs_per_day(u17)
     pub fn calculateYearDay(self: EpochDay) YearAndDay {
@@ -168,7 +168,7 @@ pub const DaySeconds = struct {
     }
 };
 
-/// seconds since epoch Oct 1, 1970 at 12:00 AM
+/// seconds since epoch Jan 1, 1970 at 12:00 AM
 pub const EpochSeconds = struct {
     secs: u64,