diff --git a/almanac.py b/almanac.py
index 002e72f..cb225db 100755
--- a/almanac.py
+++ b/almanac.py
@@ -165,12 +165,14 @@ def body(name):
 
 
 # @cached({})
-def time(t):
+def time(t, *a, **k):
     "python datetime (UT1) -> skyfield time"
     if isinstance(t, Time):
         return t
-    # return ts.from_datetime(t.replace(tzinfo=utc))
-    return ts.ut1(t.year, t.month, t.day, t.hour, t.minute, t.second + t.microsecond / 1e6)
+    if isinstance(t, datetime):
+        # return ts.from_datetime(t.replace(tzinfo=utc))
+        return ts.ut1(t.year, t.month, t.day, t.hour, t.minute, t.second + t.microsecond / 1e6)
+    return datetime(t, *a, **k)
 
 
 def dtime(t):
@@ -911,10 +913,10 @@ def render(template, variables={}, progress=None):
     })
     env.globals.update(variables)
     env.globals.update({
+        "now": datetime.utcnow(),
         "today": datetime.utcnow().date(),
         "time": time,
-        "datetime": datetime,
-        "delta": timedelta,
+        "duration": timedelta,
         "days": lambda n: timedelta(days=n),
         "hours": lambda n: timedelta(hours=n),
         "dut1": delta_ut1,
diff --git a/daily-pages.txt.j2 b/daily-pages.txt.j2
index 21c3f48..624495e 100644
--- a/daily-pages.txt.j2
+++ b/daily-pages.txt.j2
@@ -11,7 +11,7 @@ IERS polar motion data until {{iers("P","I")}}, predictions until {{iers("P","P"
 {%- endif %}
 
 {% for d in range(odays,odays+ndays,nhours//24) %}
-{%- set t = datetime(year,1,1)+days(d) %}
+{%- set t = time(year,1,1)+days(d) %}
 {%- set t1 = t+days((nhours/24/2)|int) %}
 {%- set t2 = t+hours(nhours/2) %}
 {{-t|f("{:%Y %B %d (%a)}")}}  dUT1=UT1-UTC={{dut1(t2)|f("+0.0000s")}}  dTT=TT-UT1={{dtt(t2)|f("+0.0000s")}}
diff --git a/nautical-almanac.tex.j2 b/nautical-almanac.tex.j2
index ad1969b..5e1f57c 100644
--- a/nautical-almanac.tex.j2
+++ b/nautical-almanac.tex.j2
@@ -293,7 +293,7 @@ HoE = Height of Eye, Alt = Apparent Altitude = Sextant altitude corrected for in
 \fancyhead{}
 \fancyhead[C]{\textsf{Index to Selected Stars}}
 %
-{%- set t=datetime(year,1,1) %}
+{%- set t=time(year,1,1) %}
 \begin{tabular}[t]{|l|r|r|r|r|}
 \hline
 \V Name & No & Mag & SHA & Dec \\
@@ -355,7 +355,7 @@ HoE = Height of Eye, Alt = Apparent Altitude = Sextant altitude corrected for in
 \fancyfoot[C]{\footnotesize\textsf{\texttt{ {{-ephemeris}}}} ephemeris}
 {%- endif %}
 {%- for D in range(odays,odays+ndays,pdays) %}
-{%- set t = datetime(year,1,1)+days(D) %}
+{%- set t = time(year,1,1)+days(D) %}
 %
 % {{t}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %