Fix documentation

Author: saf-dmitry

manual.md

@@ -623,7 +623,7 @@ Two user options control how the Agenda mode buffer is displayed and whether the
 
 Before being inserted into an Agenda mode buffer, the items are sorted. Sorting can be customized using the user option `taskpaper-agenda-sorting-predicate`. If the variable is `nil`, which is the default setting, agenda items just appear in the sequence in which they are found in the agenda files. The sorting predicate function is called with two string arguments, the items to compare, and should return non-nil if the first item should sort before the second one.
 
-In the example below items will be sorted according to their due dates form earliest to latest. The sorting is done by date & time value (converted to float number of seconds since the beginning of the epoch). Items, which have no or empty `@due` tag, are assumed to have 2100-12-12 as due date, effectively ending up at the bottom of the sorted list.
+In the example below items will be sorted according to their due dates form earliest to latest. The sorting is done by date & time value (converted to float number of seconds since the 1970 epoch). Items, which have no or empty `@due` tag, are assumed to have 2100-12-12 as due date, effectively ending up at the bottom of the sorted list.
 
 ```elisp
 (setq taskpaper-agenda-sorting-predicate

scripting.md

@@ -320,7 +320,7 @@ In addition to the existing sorting functions `taskpaper-sort-by-text` and `task
             #'my-taskpaper-sort-by-priority)
 ```
 
-The next function sorts items according to their due dates. The sorting is done by date/time value (converted to float number of seconds since the beginning of the epoch). Items, which have no or empty `@due` tag, are assumed to have 2100-12-12 as due date, effectively ending up at the bottom of the sorted list.
+The next function sorts items according to their due dates. The sorting is done by date/time value (converted to float number of seconds since the 1970 epoch). Items, which have no or empty `@due` tag, are assumed to have 2100-12-12 as due date, effectively ending up at the bottom of the sorted list.
 
 ```elisp
 (defun my-taskpaper-sort-by-due-date ()

taskpaper-mode.el

@@ -2563,9 +2563,9 @@ included."
 
 (defun taskpaper-time-string-to-seconds (time-str &optional timedecode)
   "Convert time string TIME-STR to a float number of seconds.
-Return the float number of seconds since the beginning of the
-epoch. When TIMEDECODE time value is given, calculate time based
-on this time, otherwise use current time."
+Return the float number of seconds since the 1970 epoch. When
+TIMEDECODE time value is given, calculate time based on this
+time, otherwise use current time."
   (float-time (apply #'encode-time
                      (taskpaper-parse-time-string time-str timedecode))))
 
@@ -3084,8 +3084,7 @@ Case is ignored."
   "Return t if two arg time strings are equal.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (= a b)))
@@ -3095,8 +3094,7 @@ epoch."
   "Return t if first arg time string is less than second.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (< a b)))
@@ -3106,8 +3104,7 @@ epoch."
   "Return t if first arg time string is less than or equal to second.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (<= a b)))
@@ -3117,8 +3114,7 @@ epoch."
   "Return t if first arg time string is greater than second.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (> a b)))
@@ -3128,8 +3124,7 @@ epoch."
   "Return t if first arg time string is greater than or equal to second.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (>= a b)))
@@ -3139,8 +3134,7 @@ epoch."
   "Return t if two arg time strings are not equal.
 Time string are converted to a float number of seconds before
 numeric comparing. If any argument is a float number, it will be
-treated as the float number of seconds since the beginning of the
-epoch."
+treated as the float number of seconds since the 1970 epoch."
   (cond ((and a b)
          (setq a (taskpaper-2ft a) b (taskpaper-2ft b))
          (and (> a 0) (> b 0) (not (= a b))))