1 files changed, 68 insertions, 0 deletions
diff --git a/src/cmd/date.zig b/src/cmd/date.zig
new file mode 100644
index 0000000..c6db0a2
--- /dev/null
+++ b/src/cmd/date.zig
@@ -0,0 +1,68 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const print = std.debug.print;
+
+const types = @import("./types.zig");
+const CommandStatus = types.CommandStatus;
+const OutputCapture = types.OutputCapture;
+const InputSource = types.InputSource;
+
+fn isLeapYear(year: u32) bool {
+    return (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0);
+}
+
+pub const Date = struct {
+    pub fn eval(date: Date, allocator: Allocator, output_capture: ?*OutputCapture, input_source: ?*InputSource) !CommandStatus {
+        _ = date;
+        _ = input_source;
+
+        const timestamp = std.time.timestamp();
+        const epoch_seconds = @as(u64, @intCast(timestamp));
+        const epoch_day = @divFloor(epoch_seconds, std.time.s_per_day);
+
+        // Calculate days since Unix epoch (1970-01-01)
+        // Unix epoch is 719163 days since year 1 AD
+        const days_since_year_1 = epoch_day + 719163;
+
+        // Simple algorithm to convert days to year/month/day
+        var year: u32 = 1;
+        var remaining_days = days_since_year_1;
+
+        // Find the year
+        while (true) {
+            const days_in_year: u64 = if (isLeapYear(year)) 366 else 365;
+            if (remaining_days < days_in_year) break;
+            remaining_days -= days_in_year;
+            year += 1;
+        }
+
+        // Days in each month (non-leap year)
+        const days_in_month = [_]u32{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+        var month: u32 = 1;
+        for (days_in_month, 1..) |days, m| {
+            var month_days = days;
+            // Adjust February for leap years
+            if (m == 2 and isLeapYear(year)) {
+                month_days = 29;
+            }
+
+            if (remaining_days < month_days) {
+                month = @intCast(m);
+                break;
+            }
+            remaining_days -= month_days;
+        }
+
+        const day = remaining_days + 1; // Days are 1-indexed
+
+        const output = try std.fmt.allocPrint(allocator, "Current date is {d:0>2}/{d:0>2}/{d}\n", .{ month, day, year });
+        defer allocator.free(output);
+        if (output_capture) |capture| {
+            try capture.write(output);
+        } else {
+            print("{s}", .{output});
+        }
+        return CommandStatus{ .Code = 0 };
+    }
+};